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green · cool

#16b721

a dark, electric green · cool · closest name: Lime Green

Token name suggestion: Shadow Basil

RGB
22, 183, 33
HSL
124°, 79%, 40%
CMYK
88, 0, 82, 28
Luminance
0.3415

#16b721 is a dark electric green, 124° on the wheel and 64/100 on the cool side. Put black text on it (7.83:1). As text it scores 2.68:1 on white — use #118919 instead. Nearest name is Lime Green, nearest Tailwind family is green.

hsl(124 79% 40%)rgb(22 183 33)Base step 700AAA inkCool

At a glance

Every number on this page in one read: what #16b721 is made of, how bright it looks, and which way it leans.

Hex
#16b721
Hue
124°
green
Saturation
79%
electric
Lightness
40%
dark
Brightness
72%
HSV value
Perceived
55%
weighted brightness
Luminance
0.3415
WCAG relative
Temperature
Cool
64/100 cool
Color family
Green
Tone
Electric
Best ink
Black
7.83:1
Closest name
Lime Green
ΔE2000 5.9
Chroma
87.8
LCH, 0–130ish
OKLCH L
0.678
perceptual lightness
Tailwind
green
500 · ΔE 7.1
Web-safe
#00CC33
nearest of 216
Where it sits
Hue124° of 360°
Saturation79%
Lightness40%
Saturation × lightness field

Left edge is grey, right edge is full chroma; top is white, bottom is black. The dot is #16b721.

Temperature
Warm ← → Cool64% cool

Reads cool. Warm and cool siblings keep the same lightness, so you can swap one in without redoing your contrast maths.

Luminance by channel
Red0%
Green99%
Blue0%

Green carries most of what the eye calls brightness — that is why WCAG weights it 0.7152.

Every format

HEX#16b721
HEX (8-digit)#16b721ff
RGBrgb(22, 183, 33)
RGBArgba(22, 183, 33, 1)
HSLhsl(124, 79%, 40%)
HSV / HSBhsv(124, 88%, 72%)
HWBhwb(124 9% 28%)
CMYKcmyk(88%, 0%, 82%, 28%)
LABlab(65.1 -64.8 59.3)
LCHlch(65.1 87.8 137.6)
OKLCHoklch(0.678 0.219 143.2)
XYZ (D65)xyz(17.54, 34.15, 7.10)
Decimal1488673
Display P3color(display-p3 0.086 0.718 0.129)
Web-safe#00CC33

Copy-ready code

every platformclick to select
/* CSS */
color: #16b721;
background-color: #16b721;
/* CSS custom property */
--brand: #16b721;
/* Tailwind (arbitrary) */
class="text-[#16b721] bg-[#16b721]"
/* SCSS */
$brand: #16b721;
/* SwiftUI */
Color(red: 0.086, green: 0.718, blue: 0.129)
/* UIKit */
UIColor(red: 0.086, green: 0.718, blue: 0.129, alpha: 1)
/* Android XML */
<color name="brand">#16B721</color>
/* Android Compose */
Color(0xFF16B721)
/* Flutter */
Color(0xFF16B721)
/* Python / OpenCV (BGR) */
(33, 183, 22)
/* Python / PIL (RGB) */
(22, 183, 33)
/* Java AWT */
new Color(22, 183, 33)
/* .NET */
Color.FromArgb(255, 22, 183, 33)
/* OpenGL / Unity (0–1) */
(0.0863f, 0.7176f, 0.1294f, 1f)
/* LaTeX */
\definecolor{brand}{RGB}{22,183,33}
modern cssclick to select
/* mix without leaving CSS */
background: color-mix(in oklab, #16b721 85%, white);
border-color: color-mix(in oklab, #16b721 40%, transparent);
/* theme-aware in one line */
color: light-dark(#0E7215, #D3EED5);
/* relative colour syntax */
--hover: hsl(from #16b721 h s calc(l - 7));

Design tokens

The same ramp in the four formats a team actually needs. Paste one and the whole palette lands with it.

css custom propertiesclick to select
:root {
  --brand-50: #F3FCF3;
  --brand-100: #E6F9E8;
  --brand-200: #C7F5CA;
  --brand-300: #9BF3A1;
  --brand-400: #69ED72;
  --brand-500: #37E743;
  --brand-600: #1ADA27;
  --brand-700: #16b721;
  --brand-800: #12921A;
  --brand-900: #116917;
  --brand-950: #0B420E;
  --brand: #16b721;
  --brand-ink: #000000;
  --brand-surface: #F4FAF5;
  --brand-border: #C0EDC3;
  --brand-hover: #12971B;
  --brand-pressed: #0E7716;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand-surface: #142415;
    --brand-ink: #D3EED5;
  }
}
tailwind.config.jsclick to select
theme: {
  extend: {
    colors: {
      brand: {
        50: '#F3FCF3',
        100: '#E6F9E8',
        200: '#C7F5CA',
        300: '#9BF3A1',
        400: '#69ED72',
        500: '#37E743',
        600: '#1ADA27',
        700: '#16b721',
        800: '#12921A',
        900: '#116917',
        950: '#0B420E',
        DEFAULT: '#16b721',
      },
    },
  },
}
scss mapclick to select
$brand: (
  '50': #F3FCF3,
  '100': #E6F9E8,
  '200': #C7F5CA,
  '300': #9BF3A1,
  '400': #69ED72,
  '500': #37E743,
  '600': #1ADA27,
  '700': #16b721,
  '800': #12921A,
  '900': #116917,
  '950': #0B420E,
);
$brand-base: #16b721;
$brand-ink: #000000;

@function brand($step) { @return map-get($brand, $step); }
w3c design tokens (json)click to select
{
  "color": {
    "brand": {
      "50": { "$value": "#F3FCF3", "$type": "color" },
      "100": { "$value": "#E6F9E8", "$type": "color" },
      "200": { "$value": "#C7F5CA", "$type": "color" },
      "300": { "$value": "#9BF3A1", "$type": "color" },
      "400": { "$value": "#69ED72", "$type": "color" },
      "500": { "$value": "#37E743", "$type": "color" },
      "600": { "$value": "#1ADA27", "$type": "color" },
      "700": { "$value": "#16b721", "$type": "color" },
      "800": { "$value": "#12921A", "$type": "color" },
      "900": { "$value": "#116917", "$type": "color" },
      "950": { "$value": "#0B420E", "$type": "color" }
    },
    "brandInk": { "$value": "#000000", "$type": "color" }
  }
}

Best text color

Only one of black and white can be right. This is the one, with the number that proves it.

Readable at a glance#000000 on #16b721 · 7.83:1
Use #000000AAA at every size.
Aa
12px
Aa
16px
Aa
24px
Aa
White text · 2.68:1
AA fail · AA large fail · AAA fail
Aa
Black text · 7.83:1 · recommended
AA pass · AA large pass · AAA pass
Reading the other direction: #16b721 as text scores 2.68:1 on white and 7.83:1 on black.
Best tinted ink on it, if plain black or white feels flat: #0E7215 at 2.28:1.

Make it accessible

A contrast checker tells you that you failed. This tells you what to ship instead — same hue, same saturation, lightness moved only as far as WCAG demands.

The quick fox
#118919 · 4.55:1
AA on white−10% L
#118919
The quick fox
#0C6512 · 7.28:1
AAA on white−18% L
#0C6512
The quick fox
#16b721 · 7.83:1
AA on blackalready passes
#16b721
The quick fox
#16b721 · 7.83:1
AAA on blackalready passes
#16b721

Large text — 24px regular or 18.66px bold and above — only needs 3:1, so #14A91F is enough for headings on white. Non-text elements such as icons, chart strokes and focus rings also sit at 3:1 under WCAG 2.2 (1.4.11).

Accessibility — WCAG contrast

Aa
#16b721 on white: 2.68:1
AA ✗ fail · AA-large · AAA
Aa
#16b721 on black: 7.83:1
AA ✓ pass · AA-large · AAA
Against the neutral ladder

Contrast is symmetric, so each row covers both directions: #16b721 as text on that neutral, and that neutral as text on #16b721.

NeutralRatioBoth directions
White2.68:1AaAa
Slate 502.56:1AaAa
Slate 1002.45:1AaAa
Slate 2002.18:1AaAa
Slate 3001.81:1AaAa
Slate 4001.05:1AaAa
Slate 5001.77:1AaAa
Slate 6002.83:1AaAa
Slate 7003.86:1AaAa
Slate 8005.45:1AaAa
Slate 9006.66:1AaAa
Black7.83:1AaAa
Colour vision deficiency
true color
protanopia · #BBA500
deuteranopia · #AB9A35
tritanopia · #00B19C

Roughly one man in twelve has some form of colour vision deficiency. If any of the three panels above is hard to tell apart from a neighbouring colour in your palette, add a shape, an icon or a label so the meaning does not rest on hue alone.

Color scale — 50 to 950

A Tailwind-shaped ramp built around this exact hex. #16b721 is pinned to step 700; the rest hold its hue and let saturation ease off at the extremes so the pale end never turns neon.

#F3FCF3
#E6F9E8
#C7F5CA
#9BF3A1
#69ED72
#37E743
#1ADA27
#16b721
#12921A
#116917
#0B420E
Base = 700Lightest = 50 · #F3FCF3Darkest = 950 · #0B420EText step on white = 900
Perceptual ramp — OKLCH

The same eleven steps expressed in OKLCH, where equal lightness numbers actually look equally spaced. HSL ramps go muddy in the yellows and washed out in the blues; this one does not. Modern browsers render it natively — the hex ramp above is the fallback.

50100200300400500600700800900950
oklch tokensclick to select
:root {
  --brand-50: oklch(0.97 0.055 143.2);
  --brand-100: oklch(0.94 0.088 143.2);
  --brand-200: oklch(0.88 0.132 143.2);
  --brand-300: oklch(0.80 0.171 143.2);
  --brand-400: oklch(0.72 0.202 143.2);
  --brand-500: oklch(0.64 0.219 143.2);
  --brand-600: oklch(0.56 0.219 143.2);
  --brand-700: oklch(0.48 0.206 143.2);
  --brand-800: oklch(0.40 0.184 143.2);
  --brand-900: oklch(0.32 0.154 143.2);
  --brand-950: oklch(0.24 0.121 143.2);
}

Colors that work with #16b721

Not a palette — a role sheet. Each swatch answers one question you will hit while building the component.

Text on it#000000
Black wins here
Surface#F4FAF5
Tinted page background
Border#C0EDC3
Hairlines and dividers
Muted text#4B9B50
Captions on the surface
Accent#9C12BB
Second voice, not a rival
Dark variant#0E7215
Hover, pressed, headers
Light variant#E8FCEA
Selected rows, tints
Dark surface#142415
Dark-mode background
Hover#12971B
One step down in lightness
Pressed#0E7716
Two steps down
Disabled#89B48C
Chroma pulled out
Focus ring#0DD41B
Offset from the fill so it reads
Light mode
Everything in its place

Surface, border, heading and body all derive from this one hue, so the screen stays coherent without a second palette.

Primary actionSecondaryBadge
Dark mode
Same hue, inverted

Lightness flips, hue holds. The accent stays the anchor in both themes.

Primary actionSecondaryAccent

In real components

The same eight roles, wired into the interface patterns you will actually build with them. Every state below is a computed value, not a mock-up.

Buttons and states
Save changesHoverPressedDisabled
OutlineSubtleLinkFocused
Form field
you@company.com

Focus ring uses the light variant so the field still reads as one shape.

Send me product updates
Notice
Your export is ready

The file stays available for seven days. Download it before it expires.

NewBetaDraft
Data
Storage used68%
Acme LtdActive
NorthwindTrial
GlobexActive

How to use #16b721

Derived from its contrast, chroma and lightness — not from taste.

Works well for
  • Text and icons on dark surfaces
  • Primary buttons and calls to action
  • Focus rings, active and selected states
  • Headers, footers and dark-mode surfaces
  • Brand accents, badges and data highlights
Use with care
  • Text of any size on white — fails WCAG AA
  • Full-page backgrounds — tiring over long sessions
  • Black text placed on it
  • Status meaning — pair it with an icon or label, never colour alone
  • Pairing with a same-lightness hue — edges vibrate
Minimum size as text on white
Not as text
Safe as a fill behind white type
No — use #0E7215
Safe as a 1px border on white
No — use #14A91F

Meaning and mood

What a colour in this family tends to signal, and how this particular chroma and lightness change the reading.

safegrowingnaturalpermissive

Green means go, well, and grown. It carries finance, sustainability and health with almost no explanation needed.

At this chroma the association is amplified — it will dominate anything placed beside it, so give it space and use it sparingly. The low lightness adds weight and formality.

Worth knowing

Red/green pairs are the most common colour-blindness failure — never let the two carry meaning alone.

Reads as
  • FormalityHigh
  • EnergyHigh
  • Weight60/100
  • TemperatureCool
  • ApproachabilityBalanced

Colour associations are cultural and vary by market. Treat these as a starting point for a conversation with your audience, not a finding about them.

Similar colors

One move away from this hex in each direction. Every swatch is its own page.

Color relationships

The wheel positions with their names attached, so you can grab the one you actually need.

Complementary#B716AC
Analogous left#5CB716
Analogous right#16B772
Split-complement 1#7216B7
Split-complement 2#B7165C
Triadic 1#2116B7
Triadic 2#B72116
Tetradic#165CB7
On the wheel
Base+30°−30°+120°+240°+180°124°

#16b721 sits at 124°. Every dot is a harmony position and links to its own page in the table alongside.

RGB percentages

Red8.6%
Green71.8%
Blue12.9%
R · 0–255
22
0x16
G · 0–255
183
0xb7
B · 0–255
33
0x21

CMYK percentages

Cyan88.0%
Magenta0.0%
Yellow82.0%
Key (black)28.2%

Total ink coverage is 198%. Most commercial presses cap around 300% — above that, sheets stop drying properly.

Color previews

#16b721 text on a black background

contrast 7.83:1

Card sample

#16b721 text on a white background

contrast 2.68:1

Card sample

#16b721 on grey

2.45:1

#16b721 on its own surface

2.53:1

#16b721 on its dark surface

6.06:1

CSS3 live lab

Text font color

The quick brown fox

color: #16b721;
Background color
Panel with #16b721 background
background-color: #16b721;
Text shadow — hex

Glowing headline

text-shadow: 2px 2px 8px #16b721;
Text shadow — RGB

Soft neon halo

text-shadow: 0 0 14px rgba(22, 183, 33, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(22, 183, 33, 0.45);
Border & gradient
Gradient panel
border: 3px solid #16b721;
background: linear-gradient(135deg, #16b721, #16B78C);
Gradient text

Gradient headline

background: linear-gradient(90deg, #16b721, #16B7B5);
-webkit-background-clip: text;
color: transparent;
Focus ring
Focused control
outline: 2px solid #16b721;
outline-offset: 3px;
Underline & caret

Marked up text

text-decoration-color: #16b721;
caret-color: #16b721;
Left rule
Pull quote or callout
border-left: 4px solid #16b721;
Ring + tint
Selected chip
background: #E8FCEA;
box-shadow: inset 0 0 0 2px #16b721;
Conic badge
68%
background: conic-gradient(#16b721 68%, #e2e8f0 0);

Transparency

What each alpha value actually composites to. The top row is #16b721 over white; the bottom row is the same alpha over a checkerboard, so you can see what survives on a photo or a video.

Bottom row of hexes is the flattened result over white — use those when a design tool refuses transparency, or when you need a solid fallback.

alpha in every syntaxclick to select
rgba(22, 183, 33, 0.5)
rgb(22 183 33 / 50%)
#16b72180
hsl(124 79% 40% / 50%)
color-mix(in srgb, #16b721 50%, transparent)
Alpha8-digit hexFlat on white
10%#16b7211a#E8F8E9
20%#16b72133#D0F1D3
40%#16b72166#A2E2A6
60%#16b72199#73D47A
80%#16b721cc#45C54D

Gradients from #16b721

Six recipes, each built from this hex and shown with the exact CSS that produced it.

Elevation
Same hue, three lightnesses — safe anywhere
background: linear-gradient(135deg, #25E533, #16b721 45%, #0E7215);
Duotone
A short hue run reads richer than a flat fill
background: linear-gradient(120deg, #16b721, #139C83);
Complement sweep
Loud — keep it behind large type only
background: linear-gradient(90deg, #16b721, #B716AC);
Spotlight
Hero panels and app headers
background: radial-gradient(120% 120% at 20% 0%, #41E84C 0%, #16b721 45%, #0E7215 100%);
Soft wash
Section backgrounds that stay readable
background: linear-gradient(180deg, #F4FAF5, #ffffff);
Mesh
Ambient background, no image weight
background: radial-gradient(60% 60% at 15% 20%, #83E41C 0%, transparent 60%), radial-gradient(55% 55% at 85% 15%, #19D292 0%, transparent 60%), radial-gradient(70% 70% at 50% 95%, #0E7215 0%, transparent 65%), #16b721;

Monochromatic scale

Palettes built from #16b721

Shades — darker

Tints — lighter

Tones — desaturated

Color harmonies

Nearest named colors

Ranked with CIEDE2000 across all 139 CSS keywords. Under ΔE 2 the eye stops telling them apart; over ΔE 10 they are plainly different colors.

#16b721 in the real world

Where a color in this family tends to land, and the interface roles it is usually asked to play.

Industries
SustainabilityFinanceHealth and wellnessAgriculture
Common UI roles
ButtonsLinksFocus statesCharts
Print note

Sits outside most CMYK gamuts — expect a duller press result, or specify a spot ink.

On screens

Holds up across typical panel gamma. Still worth checking on an uncalibrated laptop, where mid-tones shift most.

In dark mode

Usable as-is on a dark surface at 7.83:1.

Explore nearby colors

Small, deliberate steps away from this hex — useful when you are hunting for the version of a colour that finally feels right.

#16b721, answered

What color is #16b721?

#16b721 is a dark electric green, closest to Lime Green (ΔE2000 5.9). It sits at 124° on the hue wheel with 79% saturation and 40% lightness, which reads as cool.

What is the RGB value of #16b721?

rgb(22, 183, 33) — 22 red, 183 green and 33 blue out of 255, or 8.6% / 71.8% / 12.9% by channel.

What is #16b721 in HSL and HSV?

hsl(124, 79%, 40%) and hsv(124, 88%, 72%). HSL is what CSS takes; HSV is what your design tool's picker shows, which is why the saturation numbers rarely match.

Is #16b721 a light or a dark color?

It is a mid-tone. Relative luminance is 0.3415 and perceived brightness is 55%, so black text on it reaches 7.83:1.

Should I use black or white text on #16b721?

Black. It scores 7.83:1 against #16b721, versus 2.68:1 for white — AAA at any size.

Is #16b721 accessible on a white background?

#16b721 on white scores 2.68:1, which fails WCAG AA at every size. Darken it to #118919 to reach 4.5:1, or #0C6512 for 7:1.

What is the complementary color of #16b721?

#B716AC sits directly opposite on the wheel. Softer options are the split-complements #7216B7 and #B7165C, which give the same contrast with far less vibration.

What colors go well with #16b721?

For interface work: #F4FAF5 as the surface, #C0EDC3 for borders, #4B9B50 for secondary text, #9C12BB as an accent and #0E7215 for hover and pressed states. For a palette, the analogous pair #5CB716 and #16B772 stays calm, while #B716AC is the loudest partner.

What is #16b721 in CMYK for printing?

cmyk(88%, 0%, 82%, 28%). This is a screen-to-ink approximation — a color this saturated sits outside most CMYK gamuts and will print duller than it looks here.

Is #16b721 warm or cool?

Cool — it scores 64 on a scale where 0 is the warmest orange and 100 the coolest azure. Nudged warmer it becomes #46B716; nudged cooler, #14B95C.

Which Tailwind color is closest to #16b721?

The green family — its 500 step is #22c55e, ΔE2000 7.1 away. That is a visible difference, so define #16b721 as a custom token rather than reaching for the built-in.

How do I use #16b721 in Tailwind CSS?

Inline it as an arbitrary value with bg-[#16b721] or text-[#16b721], or register the whole ramp under theme.extend.colors.brand so you get bg-brand-500 and friends. The generated 50–950 scale on this page is ready to paste into your config.

What is #16b721 with 50% opacity?

rgba(22, 183, 33, 0.5), or #16b72180 in eight-digit hex. Over white that composites to #8BDB90; over black, #0B5C11.

Is #16b721 a web-safe color?

No. The nearest web-safe colour is #00CC33, ΔE2000 5.5 away. The palette only matters for legacy displays and some email clients now.

What does the color #16b721 mean?

As a green, it reads safe, growing, natural. Green means go, well, and grown. It carries finance, sustainability and health with almost no explanation needed. At this chroma the effect is amplified — it will dominate whatever sits beside it.

What gradient works with #16b721?

The safest is same-hue elevation: linear-gradient(135deg, #25E533, #16b721 45%, #0E7215). For more colour, a short hue run to #139C83 keeps it rich without turning muddy.

Work with #16b721 in the Color Lab

Every tool opens with this colour already loaded.

Every value on this page is computed from #16b721 at request time — conversions, contrast ratios and ΔE distances are calculated, never looked up.