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green · cool

#1be921

a balanced, electric green · cool · closest name: Lime

Token name suggestion: Studio Moss

RGB
27, 233, 33
HSL
122°, 82%, 51%
CMYK
88, 0, 86, 9
Luminance
0.5862

#1be921 is a balanced electric green, 122° on the wheel and 63/100 on the cool side. Put black text on it (12.72:1). As text it scores 1.65:1 on white — use #0D8710 instead. Nearest name is Lime, nearest Tailwind family is lime.

hsl(122 82% 51%)rgb(27 233 33)Base step 600AAA inkCool

At a glance

Every number on this page in one read: what #1be921 is made of, how bright it looks, and which way it leans.

Hex
#1be921
Hue
122°
green
Saturation
82%
electric
Lightness
51%
balanced
Brightness
91%
HSV value
Perceived
70%
weighted brightness
Luminance
0.5862
WCAG relative
Temperature
Cool
63/100 cool
Color family
Green
Tone
Electric
Best ink
Black
12.72:1
Closest name
Lime
ΔE2000 4.8
Chroma
107.7
LCH, 0–130ish
OKLCH L
0.811
perceptual lightness
Tailwind
lime
500 · ΔE 10
Web-safe
#33FF33
nearest of 216
Where it sits
Hue122° of 360°
Saturation82%
Lightness51%
Saturation × lightness field

Left edge is grey, right edge is full chroma; top is white, bottom is black. The dot is #1be921.

Temperature
Warm ← → Cool63% 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#1be921
HEX (8-digit)#1be921ff
RGBrgb(27, 233, 33)
RGBArgba(27, 233, 33, 1)
HSLhsl(122, 82%, 51%)
HSV / HSBhsv(122, 88%, 91%)
HWBhwb(122 11% 9%)
CMYKcmyk(88%, 0%, 86%, 9%)
LABlab(81.1 -78.5 73.7)
LCHlch(81.1 107.7 136.8)
OKLCHoklch(0.811 0.268 142.8)
XYZ (D65)xyz(29.86, 58.62, 11.18)
Decimal1829153
Display P3color(display-p3 0.106 0.914 0.129)
Web-safe#33FF33

Copy-ready code

every platformclick to select
/* CSS */
color: #1be921;
background-color: #1be921;
/* CSS custom property */
--brand: #1be921;
/* Tailwind (arbitrary) */
class="text-[#1be921] bg-[#1be921]"
/* SCSS */
$brand: #1be921;
/* SwiftUI */
Color(red: 0.106, green: 0.914, blue: 0.129)
/* UIKit */
UIColor(red: 0.106, green: 0.914, blue: 0.129, alpha: 1)
/* Android XML */
<color name="brand">#1BE921</color>
/* Android Compose */
Color(0xFF1BE921)
/* Flutter */
Color(0xFF1BE921)
/* Python / OpenCV (BGR) */
(33, 233, 27)
/* Python / PIL (RGB) */
(27, 233, 33)
/* Java AWT */
new Color(27, 233, 33)
/* .NET */
Color.FromArgb(255, 27, 233, 33)
/* OpenGL / Unity (0–1) */
(0.1059f, 0.9137f, 0.1294f, 1f)
/* LaTeX */
\definecolor{brand}{RGB}{27,233,33}
modern cssclick to select
/* mix without leaving CSS */
background: color-mix(in oklab, #1be921 85%, white);
border-color: color-mix(in oklab, #1be921 40%, transparent);
/* theme-aware in one line */
color: light-dark(#0B740E, #D3EED3);
/* relative colour syntax */
--hover: hsl(from #1be921 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: #F2FCF3;
  --brand-100: #E6FAE6;
  --brand-200: #C6F6C7;
  --brand-300: #99F59B;
  --brand-400: #66F069;
  --brand-500: #32EB38;
  --brand-600: #1be921;
  --brand-700: #12BA17;
  --brand-800: #0E9512;
  --brand-900: #0F6C11;
  --brand-950: #09430B;
  --brand: #1be921;
  --brand-ink: #000000;
  --brand-surface: #F4FAF4;
  --brand-border: #C0EDC1;
  --brand-hover: #14CD19;
  --brand-pressed: #11AC15;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand-surface: #142414;
    --brand-ink: #D3EED3;
  }
}
tailwind.config.jsclick to select
theme: {
  extend: {
    colors: {
      brand: {
        50: '#F2FCF3',
        100: '#E6FAE6',
        200: '#C6F6C7',
        300: '#99F59B',
        400: '#66F069',
        500: '#32EB38',
        600: '#1be921',
        700: '#12BA17',
        800: '#0E9512',
        900: '#0F6C11',
        950: '#09430B',
        DEFAULT: '#1be921',
      },
    },
  },
}
scss mapclick to select
$brand: (
  '50': #F2FCF3,
  '100': #E6FAE6,
  '200': #C6F6C7,
  '300': #99F59B,
  '400': #66F069,
  '500': #32EB38,
  '600': #1be921,
  '700': #12BA17,
  '800': #0E9512,
  '900': #0F6C11,
  '950': #09430B,
);
$brand-base: #1be921;
$brand-ink: #000000;

@function brand($step) { @return map-get($brand, $step); }
w3c design tokens (json)click to select
{
  "color": {
    "brand": {
      "50": { "$value": "#F2FCF3", "$type": "color" },
      "100": { "$value": "#E6FAE6", "$type": "color" },
      "200": { "$value": "#C6F6C7", "$type": "color" },
      "300": { "$value": "#99F59B", "$type": "color" },
      "400": { "$value": "#66F069", "$type": "color" },
      "500": { "$value": "#32EB38", "$type": "color" },
      "600": { "$value": "#1be921", "$type": "color" },
      "700": { "$value": "#12BA17", "$type": "color" },
      "800": { "$value": "#0E9512", "$type": "color" },
      "900": { "$value": "#0F6C11", "$type": "color" },
      "950": { "$value": "#09430B", "$type": "color" }
    },
    "brandInk": { "$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 #1be921 · 12.72:1
Use #000000AAA at every size.
Aa
12px
Aa
16px
Aa
24px
Aa
White text · 1.65:1
AA fail · AA large fail · AAA fail
Aa
Black text · 12.72:1 · recommended
AA pass · AA large pass · AAA pass
Reading the other direction: #1be921 as text scores 1.65:1 on white and 12.72:1 on black.
Best tinted ink on it, if plain black or white feels flat: #0B740E at 3.62:1.

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
#0D8710 · 4.68:1
AA on white−22% L
#0D8710
The quick fox
#0A660C · 7.19:1
AAA on white−29% L
#0A660C
The quick fox
#1be921 · 12.72:1
AA on blackalready passes
#1be921
The quick fox
#1be921 · 12.72:1
AAA on blackalready passes
#1be921

Large text — 24px regular or 18.66px bold and above — only needs 3:1, so #11AC15 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
#1be921 on white: 1.65:1
AA ✗ fail · AA-large · AAA
Aa
#1be921 on black: 12.72:1
AA ✓ pass · AA-large · AAA
Against the neutral ladder

Contrast is symmetric, so each row covers both directions: #1be921 as text on that neutral, and that neutral as text on #1be921.

NeutralRatioBoth directions
White1.65:1AaAa
Slate 501.58:1AaAa
Slate 1001.51:1AaAa
Slate 2001.34:1AaAa
Slate 3001.11:1AaAa
Slate 4001.55:1AaAa
Slate 5002.88:1AaAa
Slate 6004.59:1AaAa
Slate 7006.27:1AaAa
Slate 8008.86:1AaAa
Slate 90010.82:1AaAa
Black12.72:1AaAa
Colour vision deficiency
true color
protanopia · #EED200
deuteranopia · #DAC43F
tritanopia · #00E2C7

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. #1be921 is pinned to step 600; the rest hold its hue and let saturation ease off at the extremes so the pale end never turns neon.

#F2FCF3
#E6FAE6
#C6F6C7
#99F59B
#66F069
#32EB38
#1be921
#12BA17
#0E9512
#0F6C11
#09430B
Base = 600Lightest = 50 · #F2FCF3Darkest = 950 · #09430BText 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 0.067 142.8);
  --brand-100: oklch(0.94 0.107 142.8);
  --brand-200: oklch(0.88 0.161 142.8);
  --brand-300: oklch(0.80 0.209 142.8);
  --brand-400: oklch(0.72 0.246 142.8);
  --brand-500: oklch(0.64 0.268 142.8);
  --brand-600: oklch(0.56 0.268 142.8);
  --brand-700: oklch(0.48 0.251 142.8);
  --brand-800: oklch(0.40 0.225 142.8);
  --brand-900: oklch(0.32 0.187 142.8);
  --brand-950: oklch(0.24 0.147 142.8);
}

Colors that work with #1be921

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#F4FAF4
Tinted page background
Border#C0EDC1
Hairlines and dividers
Muted text#4B9B4D
Captions on the surface
Accent#BE16EE
Second voice, not a rival
Dark variant#0B740E
Hover, pressed, headers
Light variant#E8FDE8
Selected rows, tints
Dark surface#142414
Dark-mode background
Hover#14CD19
One step down in lightness
Pressed#11AC15
Two steps down
Disabled#ABC9AC
Chroma pulled out
Focus ring#22F628
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 #1be921

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
  • Brand accents, badges and data highlights
  • Chart series and data categories
Use with care
  • Text of any size on white — fails WCAG AA
  • Full-page backgrounds — tiring over long sessions
  • 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 #0B740E
Safe as a 1px border on white
No — use #11AC15

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 mid lightness keeps it versatile in both themes.

Worth knowing

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

Reads as
  • FormalityLow
  • EnergyHigh
  • Weight49/100
  • 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#E91BE3
Analogous left#7CE91B
Analogous right#1BE988
Split-complement 1#881BE9
Split-complement 2#E91B7C
Triadic 1#211BE9
Triadic 2#E9211B
Tetradic#1B7CE9
On the wheel
Base+30°−30°+120°+240°+180°122°

#1be921 sits at 122°. Every dot is a harmony position and links to its own page in the table alongside.

RGB percentages

Red10.6%
Green91.4%
Blue12.9%
R · 0–255
27
0x1b
G · 0–255
233
0xe9
B · 0–255
33
0x21

CMYK percentages

Cyan88.4%
Magenta0.0%
Yellow85.8%
Key (black)8.6%

Total ink coverage is 183%. Most commercial presses cap around 300% — above that, sheets stop drying properly.

Color previews

#1be921 text on a black background

contrast 12.72:1

Card sample

#1be921 text on a white background

contrast 1.65:1

Card sample

#1be921 on grey

1.51:1

#1be921 on its own surface

1.56:1

#1be921 on its dark surface

9.85:1

CSS3 live lab

Text font color

The quick brown fox

color: #1be921;
Background color
Panel with #1be921 background
background-color: #1be921;
Text shadow — hex

Glowing headline

text-shadow: 2px 2px 8px #1be921;
Text shadow — RGB

Soft neon halo

text-shadow: 0 0 14px rgba(27, 233, 33, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(27, 233, 33, 0.45);
Border & gradient
Gradient panel
border: 3px solid #1be921;
background: linear-gradient(135deg, #1be921, #1BE9AA);
Gradient text

Gradient headline

background: linear-gradient(90deg, #1be921, #1BE9DE);
-webkit-background-clip: text;
color: transparent;
Focus ring
Focused control
outline: 2px solid #1be921;
outline-offset: 3px;
Underline & caret

Marked up text

text-decoration-color: #1be921;
caret-color: #1be921;
Left rule
Pull quote or callout
border-left: 4px solid #1be921;
Ring + tint
Selected chip
background: #E8FDE8;
box-shadow: inset 0 0 0 2px #1be921;
Conic badge
68%
background: conic-gradient(#1be921 68%, #e2e8f0 0);

Transparency

What each alpha value actually composites to. The top row is #1be921 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(27, 233, 33, 0.5)
rgb(27 233 33 / 50%)
#1be92180
hsl(122 82% 51% / 50%)
color-mix(in srgb, #1be921 50%, transparent)
Alpha8-digit hexFlat on white
10%#1be9211a#E8FDE9
20%#1be92133#D1FBD3
40%#1be92166#A4F6A6
60%#1be92199#76F27A
80%#1be921cc#49ED4D

Gradients from #1be921

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, #53EE57, #1be921 45%, #0B740E);
Duotone
A short hue run reads richer than a flat fill
background: linear-gradient(120deg, #1be921, #14D1A7);
Complement sweep
Loud — keep it behind large type only
background: linear-gradient(90deg, #1be921, #E91BE3);
Spotlight
Hero panels and app headers
background: radial-gradient(120% 120% at 20% 0%, #6FF173 0%, #1be921 45%, #0B740E 100%);
Soft wash
Section backgrounds that stay readable
background: linear-gradient(180deg, #F4FAF4, #ffffff);
Mesh
Ambient background, no image weight
background: radial-gradient(60% 60% at 15% 20%, #A5ED4A 0%, transparent 60%), radial-gradient(55% 55% at 85% 15%, #37ECA6 0%, transparent 60%), radial-gradient(70% 70% at 50% 95%, #0B740E 0%, transparent 65%), #1be921;

Monochromatic scale

Palettes built from #1be921

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.

#1be921 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 12.72:1.

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.

#1be921, answered

What color is #1be921?

#1be921 is a balanced electric green, closest to Lime (ΔE2000 4.8). It sits at 122° on the hue wheel with 82% saturation and 51% lightness, which reads as cool.

What is the RGB value of #1be921?

rgb(27, 233, 33) — 27 red, 233 green and 33 blue out of 255, or 10.6% / 91.4% / 12.9% by channel.

What is #1be921 in HSL and HSV?

hsl(122, 82%, 51%) and hsv(122, 88%, 91%). HSL is what CSS takes; HSV is what your design tool's picker shows, which is why the saturation numbers rarely match.

Is #1be921 a light or a dark color?

It is a light color. Relative luminance is 0.5862 and perceived brightness is 70%, so black text on it reaches 12.72:1.

Should I use black or white text on #1be921?

Black. It scores 12.72:1 against #1be921, versus 1.65:1 for white — AAA at any size.

Is #1be921 accessible on a white background?

#1be921 on white scores 1.65:1, which fails WCAG AA at every size. Darken it to #0D8710 to reach 4.5:1, or #0A660C for 7:1.

What is the complementary color of #1be921?

#E91BE3 sits directly opposite on the wheel. Softer options are the split-complements #881BE9 and #E91B7C, which give the same contrast with far less vibration.

What colors go well with #1be921?

For interface work: #F4FAF4 as the surface, #C0EDC1 for borders, #4B9B4D for secondary text, #BE16EE as an accent and #0B740E for hover and pressed states. For a palette, the analogous pair #7CE91B and #1BE988 stays calm, while #E91BE3 is the loudest partner.

What is #1be921 in CMYK for printing?

cmyk(88%, 0%, 86%, 9%). 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 #1be921 warm or cool?

Cool — it scores 63 on a scale where 0 is the warmest orange and 100 the coolest azure. Nudged warmer it becomes #61E91B; nudged cooler, #19EC6C.

Which Tailwind color is closest to #1be921?

The lime family — its 500 step is #84cc16, ΔE2000 10 away. That is a visible difference, so define #1be921 as a custom token rather than reaching for the built-in.

How do I use #1be921 in Tailwind CSS?

Inline it as an arbitrary value with bg-[#1be921] or text-[#1be921], 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 #1be921 with 50% opacity?

rgba(27, 233, 33, 0.5), or #1be92180 in eight-digit hex. Over white that composites to #8DF490; over black, #0E7511.

Is #1be921 a web-safe color?

No. The nearest web-safe colour is #33FF33, ΔE2000 4.7 away. The palette only matters for legacy displays and some email clients now.

What does the color #1be921 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 #1be921?

The safest is same-hue elevation: linear-gradient(135deg, #53EE57, #1be921 45%, #0B740E). For more colour, a short hue run to #14D1A7 keeps it rich without turning muddy.

Work with #1be921 in the Color Lab

Every tool opens with this colour already loaded.

Every value on this page is computed from #1be921 at request time — conversions, contrast ratios and ΔE distances are calculated, never looked up.