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yellow · warm

#9eb201

a dark, electric yellow · warm · closest name: Yellow Green

Token name suggestion: Shadow Honey

RGB
158, 178, 1
HSL
67°, 99%, 35%
CMYK
11, 0, 99, 30
Luminance
0.3911

#9eb201 is a dark electric yellow, 67° on the wheel and 31/100 on the cool side. Put black text on it (8.82:1). As text it scores 2.38:1 on white — use #6C7A01 instead. Nearest name is Yellow Green, nearest Tailwind family is lime.

hsl(67 99% 35%)rgb(158 178 1)Base step 800AAA inkWarm

At a glance

Every number on this page in one read: what #9eb201 is made of, how bright it looks, and which way it leans.

Hex
#9eb201
Hue
67°
yellow
Saturation
99%
electric
Lightness
35%
dark
Brightness
70%
HSV value
Perceived
63%
weighted brightness
Luminance
0.3911
WCAG relative
Temperature
Warm
31/100 cool
Color family
Yellow
Tone
Electric
Best ink
Black
8.82:1
Closest name
Yellow Green
ΔE2000 8.5
Chroma
74.5
LCH, 0–130ish
OKLCH L
0.723
perceptual lightness
Tailwind
lime
500 · ΔE 9.9
Web-safe
#999900
nearest of 216
Where it sits
Hue67° of 360°
Saturation99%
Lightness35%
Saturation × lightness field

Left edge is grey, right edge is full chroma; top is white, bottom is black. The dot is #9eb201.

Temperature
Warm ← → Cool31% cool

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

Luminance by channel
Red19%
Green81%
Blue0%

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

Every format

HEX#9eb201
HEX (8-digit)#9eb201ff
RGBrgb(158, 178, 1)
RGBArgba(158, 178, 1, 1)
HSLhsl(67, 99%, 35%)
HSV / HSBhsv(67, 99%, 70%)
HWBhwb(67 0% 30%)
CMYKcmyk(11%, 0%, 99%, 30%)
LABlab(68.8 -25.1 70.2)
LCHlch(68.8 74.5 109.7)
OKLCHoklch(0.723 0.167 117.5)
XYZ (D65)xyz(30.03, 39.11, 6.00)
Decimal10400257
Display P3color(display-p3 0.620 0.698 0.004)
Web-safe#999900

Copy-ready code

every platformclick to select
/* CSS */
color: #9eb201;
background-color: #9eb201;
/* CSS custom property */
--brand: #9eb201;
/* Tailwind (arbitrary) */
class="text-[#9eb201] bg-[#9eb201]"
/* SCSS */
$brand: #9eb201;
/* SwiftUI */
Color(red: 0.620, green: 0.698, blue: 0.004)
/* UIKit */
UIColor(red: 0.620, green: 0.698, blue: 0.004, alpha: 1)
/* Android XML */
<color name="brand">#9EB201</color>
/* Android Compose */
Color(0xFF9EB201)
/* Flutter */
Color(0xFF9EB201)
/* Python / OpenCV (BGR) */
(1, 178, 158)
/* Python / PIL (RGB) */
(158, 178, 1)
/* Java AWT */
new Color(158, 178, 1)
/* .NET */
Color.FromArgb(255, 158, 178, 1)
/* OpenGL / Unity (0–1) */
(0.6196f, 0.6980f, 0.0039f, 1f)
/* LaTeX */
\definecolor{brand}{RGB}{158,178,1}
modern cssclick to select
/* mix without leaving CSS */
background: color-mix(in oklab, #9eb201 85%, white);
border-color: color-mix(in oklab, #9eb201 40%, transparent);
/* theme-aware in one line */
color: light-dark(#717F01, #EBEED3);
/* relative colour syntax */
--hover: hsl(from #9eb201 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: #FCFEF1;
  --brand-100: #F9FCE3;
  --brand-200: #F5FBC0;
  --brand-300: #F2FE8F;
  --brand-400: #EBFE58;
  --brand-500: #E5FE20;
  --brand-600: #D8F301;
  --brand-700: #B4CB01;
  --brand-800: #9eb201;
  --brand-900: #687506;
  --brand-950: #414903;
  --brand: #9eb201;
  --brand-ink: #000000;
  --brand-surface: #FAFAF4;
  --brand-border: #E8EDC0;
  --brand-hover: #7E8F01;
  --brand-pressed: #5F6B01;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand-surface: #232414;
    --brand-ink: #EBEED3;
  }
}
tailwind.config.jsclick to select
theme: {
  extend: {
    colors: {
      brand: {
        50: '#FCFEF1',
        100: '#F9FCE3',
        200: '#F5FBC0',
        300: '#F2FE8F',
        400: '#EBFE58',
        500: '#E5FE20',
        600: '#D8F301',
        700: '#B4CB01',
        800: '#9eb201',
        900: '#687506',
        950: '#414903',
        DEFAULT: '#9eb201',
      },
    },
  },
}
scss mapclick to select
$brand: (
  '50': #FCFEF1,
  '100': #F9FCE3,
  '200': #F5FBC0,
  '300': #F2FE8F,
  '400': #EBFE58,
  '500': #E5FE20,
  '600': #D8F301,
  '700': #B4CB01,
  '800': #9eb201,
  '900': #687506,
  '950': #414903,
);
$brand-base: #9eb201;
$brand-ink: #000000;

@function brand($step) { @return map-get($brand, $step); }
w3c design tokens (json)click to select
{
  "color": {
    "brand": {
      "50": { "$value": "#FCFEF1", "$type": "color" },
      "100": { "$value": "#F9FCE3", "$type": "color" },
      "200": { "$value": "#F5FBC0", "$type": "color" },
      "300": { "$value": "#F2FE8F", "$type": "color" },
      "400": { "$value": "#EBFE58", "$type": "color" },
      "500": { "$value": "#E5FE20", "$type": "color" },
      "600": { "$value": "#D8F301", "$type": "color" },
      "700": { "$value": "#B4CB01", "$type": "color" },
      "800": { "$value": "#9eb201", "$type": "color" },
      "900": { "$value": "#687506", "$type": "color" },
      "950": { "$value": "#414903", "$type": "color" }
    },
    "brandInk": { "$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 #9eb201 · 8.82:1
Use #000000AAA at every size.
Aa
12px
Aa
16px
Aa
24px
Aa
White text · 2.38:1
AA fail · AA large fail · AAA fail
Aa
Black text · 8.82:1 · recommended
AA pass · AA large pass · AAA pass
Reading the other direction: #9eb201 as text scores 2.38:1 on white and 8.82:1 on black.
Best tinted ink on it, if plain black or white feels flat: #717F01 at 1.86:1.

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
#6C7A01 · 4.75:1
AA on white−11% L
#6C7A01
The quick fox
#515C01 · 7.29:1
AAA on white−17% L
#515C01
The quick fox
#9eb201 · 8.82:1
AA on blackalready passes
#9eb201
The quick fox
#9eb201 · 8.82:1
AAA on blackalready passes
#9eb201

Large text — 24px regular or 18.66px bold and above — only needs 3:1, so #8C9E01 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
#9eb201 on white: 2.38:1
AA ✗ fail · AA-large · AAA
Aa
#9eb201 on black: 8.82:1
AA ✓ pass · AA-large · AAA
Against the neutral ladder

Contrast is symmetric, so each row covers both directions: #9eb201 as text on that neutral, and that neutral as text on #9eb201.

NeutralRatioBoth directions
White2.38:1AaAa
Slate 502.28:1AaAa
Slate 1002.17:1AaAa
Slate 2001.93:1AaAa
Slate 3001.60:1AaAa
Slate 4001.08:1AaAa
Slate 5002.00:1AaAa
Slate 6003.18:1AaAa
Slate 7004.35:1AaAa
Slate 8006.15:1AaAa
Slate 9007.50:1AaAa
Black8.82:1AaAa
Colour vision deficiency
true color
protanopia · #BFA800
deuteranopia · #BDA921
tritanopia · #A9A797

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. #9eb201 is pinned to step 800; the rest hold its hue and let saturation ease off at the extremes so the pale end never turns neon.

#FCFEF1
#F9FCE3
#F5FBC0
#F2FE8F
#EBFE58
#E5FE20
#D8F301
#B4CB01
#9eb201
#687506
#414903
Base = 800Lightest = 50 · #FCFEF1Darkest = 950 · #414903Text 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 0.042 117.5);
  --brand-100: oklch(0.94 0.067 117.5);
  --brand-200: oklch(0.88 0.100 117.5);
  --brand-300: oklch(0.80 0.130 117.5);
  --brand-400: oklch(0.72 0.154 117.5);
  --brand-500: oklch(0.64 0.167 117.5);
  --brand-600: oklch(0.56 0.167 117.5);
  --brand-700: oklch(0.48 0.157 117.5);
  --brand-800: oklch(0.40 0.141 117.5);
  --brand-900: oklch(0.32 0.117 117.5);
  --brand-950: oklch(0.24 0.092 117.5);
}

Colors that work with #9eb201

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#FAFAF4
Tinted page background
Border#E8EDC0
Hairlines and dividers
Muted text#929B4B
Captions on the surface
Accent#0018B3
Second voice, not a rival
Dark variant#717F01
Hover, pressed, headers
Light variant#FCFFE6
Selected rows, tints
Dark surface#232414
Dark-mode background
Hover#7E8F01
One step down in lightness
Pressed#5F6B01
Two steps down
Disabled#A4AA7A
Chroma pulled out
Focus ring#B1C700
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 #9eb201

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
  • Thin strokes and 1px borders — they disappear on light UI
  • 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 #717F01
Safe as a 1px border on white
No — use #8C9E01

Meaning and mood

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

optimisticalertcheap-and-cheerfulvisible

The most visible hue at low light levels, which is why it owns warnings, hazard tape and value retail.

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

Almost never passes contrast against white. Treat it as a surface or a marker, not as text.

Reads as
  • FormalityHigh
  • EnergyHigh
  • Weight65/100
  • TemperatureWarm
  • ApproachabilityHigh

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#1501B2
Analogous left#B26E01
Analogous right#45B201
Split-complement 1#0145B2
Split-complement 2#6E01B2
Triadic 1#019EB2
Triadic 2#B2019E
Tetradic#01B26E
On the wheel
Base+30°−30°+120°+240°+180°67°

#9eb201 sits at 67°. Every dot is a harmony position and links to its own page in the table alongside.

RGB percentages

Red62.0%
Green69.8%
Blue0.4%
R · 0–255
158
0x9e
G · 0–255
178
0xb2
B · 0–255
1
0x01

CMYK percentages

Cyan11.2%
Magenta0.0%
Yellow99.4%
Key (black)30.2%

Total ink coverage is 141%. Most commercial presses cap around 300% — above that, sheets stop drying properly.

Color previews

#9eb201 text on a black background

contrast 8.82:1

Card sample

#9eb201 text on a white background

contrast 2.38:1

Card sample

#9eb201 on grey

2.17:1

#9eb201 on its own surface

2.27:1

#9eb201 on its dark surface

6.61:1

CSS3 live lab

Text font color

The quick brown fox

color: #9eb201;
Background color
Panel with #9eb201 background
background-color: #9eb201;
Text shadow — hex

Glowing headline

text-shadow: 2px 2px 8px #9eb201;
Text shadow — RGB

Soft neon halo

text-shadow: 0 0 14px rgba(158, 178, 1, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(158, 178, 1, 0.45);
Border & gradient
Gradient panel
border: 3px solid #9eb201;
background: linear-gradient(135deg, #9eb201, #28B201);
Gradient text

Gradient headline

background: linear-gradient(90deg, #9eb201, #01B206);
-webkit-background-clip: text;
color: transparent;
Focus ring
Focused control
outline: 2px solid #9eb201;
outline-offset: 3px;
Underline & caret

Marked up text

text-decoration-color: #9eb201;
caret-color: #9eb201;
Left rule
Pull quote or callout
border-left: 4px solid #9eb201;
Ring + tint
Selected chip
background: #FCFFE6;
box-shadow: inset 0 0 0 2px #9eb201;
Conic badge
68%
background: conic-gradient(#9eb201 68%, #e2e8f0 0);

Transparency

What each alpha value actually composites to. The top row is #9eb201 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(158, 178, 1, 0.5)
rgb(158 178 1 / 50%)
#9eb20180
hsl(67 99% 35% / 50%)
color-mix(in srgb, #9eb201 50%, transparent)
Alpha8-digit hexFlat on white
10%#9eb2011a#F5F7E6
20%#9eb20133#ECF0CC
40%#9eb20166#D8E099
60%#9eb20199#C5D167
80%#9eb201cc#B1C134

Gradients from #9eb201

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, #D4EF01, #9eb201 45%, #717F01);
Duotone
A short hue run reads richer than a flat fill
background: linear-gradient(120deg, #9eb201, #159401);
Complement sweep
Loud — keep it behind large type only
background: linear-gradient(90deg, #9eb201, #1501B2);
Spotlight
Hero panels and app headers
background: radial-gradient(120% 120% at 20% 0%, #E3FE11 0%, #9eb201 45%, #717F01 100%);
Soft wash
Section backgrounds that stay readable
background: linear-gradient(180deg, #FAFAF4, #ffffff);
Mesh
Ambient background, no image weight
background: radial-gradient(60% 60% at 15% 20%, #E57A01 0%, transparent 60%), radial-gradient(55% 55% at 85% 15%, #40D001 0%, transparent 60%), radial-gradient(70% 70% at 50% 95%, #717F01 0%, transparent 65%), #9eb201;

Monochromatic scale

Palettes built from #9eb201

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.

#9eb201 in the real world

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

Industries
RetailLeisureEnergyWarning systems
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 8.82:1.

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.

#9eb201, answered

What color is #9eb201?

#9eb201 is a dark electric yellow, closest to Yellow Green (ΔE2000 8.5). It sits at 67° on the hue wheel with 99% saturation and 35% lightness, which reads as warm.

What is the RGB value of #9eb201?

rgb(158, 178, 1) — 158 red, 178 green and 1 blue out of 255, or 62% / 69.8% / 0.4% by channel.

What is #9eb201 in HSL and HSV?

hsl(67, 99%, 35%) and hsv(67, 99%, 70%). HSL is what CSS takes; HSV is what your design tool's picker shows, which is why the saturation numbers rarely match.

Is #9eb201 a light or a dark color?

It is a mid-tone. Relative luminance is 0.3911 and perceived brightness is 63%, so black text on it reaches 8.82:1.

Should I use black or white text on #9eb201?

Black. It scores 8.82:1 against #9eb201, versus 2.38:1 for white — AAA at any size.

Is #9eb201 accessible on a white background?

#9eb201 on white scores 2.38:1, which fails WCAG AA at every size. Darken it to #6C7A01 to reach 4.5:1, or #515C01 for 7:1.

What is the complementary color of #9eb201?

#1501B2 sits directly opposite on the wheel. Softer options are the split-complements #0145B2 and #6E01B2, which give the same contrast with far less vibration.

What colors go well with #9eb201?

For interface work: #FAFAF4 as the surface, #E8EDC0 for borders, #929B4B for secondary text, #0018B3 as an accent and #717F01 for hover and pressed states. For a palette, the analogous pair #B26E01 and #45B201 stays calm, while #1501B2 is the loudest partner.

What is #9eb201 in CMYK for printing?

cmyk(11%, 0%, 99%, 30%). 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 #9eb201 warm or cool?

Warm — it scores 31 on a scale where 0 is the warmest orange and 100 the coolest azure. Nudged warmer it becomes #B28501; nudged cooler, #5DB300.

Which Tailwind color is closest to #9eb201?

The lime family — its 500 step is #84cc16, ΔE2000 9.9 away. That is a visible difference, so define #9eb201 as a custom token rather than reaching for the built-in.

How do I use #9eb201 in Tailwind CSS?

Inline it as an arbitrary value with bg-[#9eb201] or text-[#9eb201], 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 #9eb201 with 50% opacity?

rgba(158, 178, 1, 0.5), or #9eb20180 in eight-digit hex. Over white that composites to #CFD980; over black, #4F5901.

Is #9eb201 a web-safe color?

No. The nearest web-safe colour is #999900, ΔE2000 7.9 away. The palette only matters for legacy displays and some email clients now.

What does the color #9eb201 mean?

As a yellow, it reads optimistic, alert, cheap-and-cheerful. The most visible hue at low light levels, which is why it owns warnings, hazard tape and value retail. At this chroma the effect is amplified — it will dominate whatever sits beside it.

What gradient works with #9eb201?

The safest is same-hue elevation: linear-gradient(135deg, #D4EF01, #9eb201 45%, #717F01). For more colour, a short hue run to #159401 keeps it rich without turning muddy.

Work with #9eb201 in the Color Lab

Every tool opens with this colour already loaded.

Every value on this page is computed from #9eb201 at request time — conversions, contrast ratios and ΔE distances are calculated, never looked up.