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yellow · warm

#ddf640

a balanced, electric yellow · warm · closest name: Yellow

Token name suggestion: True Honey

RGB
221, 246, 64
HSL
68°, 91%, 61%
CMYK
10, 0, 74, 4
Luminance
0.8165

#ddf640 is a balanced electric yellow, 68° on the wheel and 32/100 on the cool side. Put black text on it (17.33:1). As text it scores 1.21:1 on white — use #6D7E06 instead. Nearest name is Yellow, nearest Tailwind family is lime.

hsl(68 91% 61%)rgb(221 246 64)Base step 500AAA inkWarm

At a glance

Every number on this page in one read: what #ddf640 is made of, how bright it looks, and which way it leans.

Hex
#ddf640
Hue
68°
yellow
Saturation
91%
electric
Lightness
61%
balanced
Brightness
96%
HSV value
Perceived
88%
weighted brightness
Luminance
0.8165
WCAG relative
Temperature
Warm
32/100 cool
Color family
Yellow
Tone
Electric
Best ink
Black
17.33:1
Closest name
Yellow
ΔE2000 7
Chroma
84.2
LCH, 0–130ish
OKLCH L
0.924
perceptual lightness
Tailwind
lime
500 · ΔE 14.1
Web-safe
#CCFF33
nearest of 216
Where it sits
Hue68° of 360°
Saturation91%
Lightness61%
Saturation × lightness field

Left edge is grey, right edge is full chroma; top is white, bottom is black. The dot is #ddf640.

Temperature
Warm ← → Cool32% 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#ddf640
HEX (8-digit)#ddf640ff
RGBrgb(221, 246, 64)
RGBArgba(221, 246, 64, 1)
HSLhsl(68, 91%, 61%)
HSV / HSBhsv(68, 74%, 96%)
HWBhwb(68 25% 4%)
CMYKcmyk(10%, 0%, 74%, 4%)
LABlab(92.4 -29.8 78.7)
LCHlch(92.4 84.2 110.7)
OKLCHoklch(0.924 0.195 117.3)
XYZ (D65)xyz(63.70, 81.65, 17.25)
Decimal14546496
Display P3color(display-p3 0.867 0.965 0.251)
Web-safe#CCFF33

Copy-ready code

every platformclick to select
/* CSS */
color: #ddf640;
background-color: #ddf640;
/* CSS custom property */
--brand: #ddf640;
/* Tailwind (arbitrary) */
class="text-[#ddf640] bg-[#ddf640]"
/* SCSS */
$brand: #ddf640;
/* SwiftUI */
Color(red: 0.867, green: 0.965, blue: 0.251)
/* UIKit */
UIColor(red: 0.867, green: 0.965, blue: 0.251, alpha: 1)
/* Android XML */
<color name="brand">#DDF640</color>
/* Android Compose */
Color(0xFFDDF640)
/* Flutter */
Color(0xFFDDF640)
/* Python / OpenCV (BGR) */
(64, 246, 221)
/* Python / PIL (RGB) */
(221, 246, 64)
/* Java AWT */
new Color(221, 246, 64)
/* .NET */
Color.FromArgb(255, 221, 246, 64)
/* OpenGL / Unity (0–1) */
(0.8667f, 0.9647f, 0.2510f, 1f)
/* LaTeX */
\definecolor{brand}{RGB}{221,246,64}
modern cssclick to select
/* mix without leaving CSS */
background: color-mix(in oklab, #ddf640 85%, white);
border-color: color-mix(in oklab, #ddf640 40%, transparent);
/* theme-aware in one line */
color: light-dark(#6A7A06, #EAEED3);
/* relative colour syntax */
--hover: hsl(from #ddf640 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: #FBFDF2;
  --brand-100: #F8FBE5;
  --brand-200: #F1F9C3;
  --brand-300: #ECFA94;
  --brand-400: #E2F75E;
  --brand-500: #ddf640;
  --brand-600: #CBEA0B;
  --brand-700: #A9C309;
  --brand-800: #889C07;
  --brand-900: #62700A;
  --brand-950: #3E4606;
  --brand: #ddf640;
  --brand-ink: #000000;
  --brand-surface: #FAFAF4;
  --brand-border: #E7EDC0;
  --brand-hover: #D7F41E;
  --brand-pressed: #C6E40B;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand-surface: #222414;
    --brand-ink: #EAEED3;
  }
}
tailwind.config.jsclick to select
theme: {
  extend: {
    colors: {
      brand: {
        50: '#FBFDF2',
        100: '#F8FBE5',
        200: '#F1F9C3',
        300: '#ECFA94',
        400: '#E2F75E',
        500: '#ddf640',
        600: '#CBEA0B',
        700: '#A9C309',
        800: '#889C07',
        900: '#62700A',
        950: '#3E4606',
        DEFAULT: '#ddf640',
      },
    },
  },
}
scss mapclick to select
$brand: (
  '50': #FBFDF2,
  '100': #F8FBE5,
  '200': #F1F9C3,
  '300': #ECFA94,
  '400': #E2F75E,
  '500': #ddf640,
  '600': #CBEA0B,
  '700': #A9C309,
  '800': #889C07,
  '900': #62700A,
  '950': #3E4606,
);
$brand-base: #ddf640;
$brand-ink: #000000;

@function brand($step) { @return map-get($brand, $step); }
w3c design tokens (json)click to select
{
  "color": {
    "brand": {
      "50": { "$value": "#FBFDF2", "$type": "color" },
      "100": { "$value": "#F8FBE5", "$type": "color" },
      "200": { "$value": "#F1F9C3", "$type": "color" },
      "300": { "$value": "#ECFA94", "$type": "color" },
      "400": { "$value": "#E2F75E", "$type": "color" },
      "500": { "$value": "#ddf640", "$type": "color" },
      "600": { "$value": "#CBEA0B", "$type": "color" },
      "700": { "$value": "#A9C309", "$type": "color" },
      "800": { "$value": "#889C07", "$type": "color" },
      "900": { "$value": "#62700A", "$type": "color" },
      "950": { "$value": "#3E4606", "$type": "color" }
    },
    "brandInk": { "$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 #ddf640 · 17.33:1
Use #000000AAA at every size.
Aa
12px
Aa
16px
Aa
24px
Aa
White text · 1.21:1
AA fail · AA large fail · AAA fail
Aa
Black text · 17.33:1 · recommended
AA pass · AA large pass · AAA pass
Reading the other direction: #ddf640 as text scores 1.21:1 on white and 17.33:1 on black.
Best tinted ink on it, if plain black or white feels flat: #6A7A06 at 3.94:1.

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
#6D7E06 · 4.53:1
AA on white−35% L
#6D7E06
The quick fox
#505C04 · 7.31:1
AAA on white−42% L
#505C04
The quick fox
#ddf640 · 17.33:1
AA on blackalready passes
#ddf640
The quick fox
#ddf640 · 17.33:1
AAA on blackalready passes
#ddf640

Large text — 24px regular or 18.66px bold and above — only needs 3:1, so #879B07 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
#ddf640 on white: 1.21:1
AA ✗ fail · AA-large · AAA
Aa
#ddf640 on black: 17.33:1
AA ✓ pass · AA-large · AAA
Against the neutral ladder

Contrast is symmetric, so each row covers both directions: #ddf640 as text on that neutral, and that neutral as text on #ddf640.

NeutralRatioBoth directions
White1.21:1AaAa
Slate 501.16:1AaAa
Slate 1001.11:1AaAa
Slate 2001.02:1AaAa
Slate 3001.23:1AaAa
Slate 4002.12:1AaAa
Slate 5003.93:1AaAa
Slate 6006.25:1AaAa
Slate 7008.55:1AaAa
Slate 80012.07:1AaAa
Slate 90014.73:1AaAa
Black17.33:1AaAa
Colour vision deficiency
true color
protanopia · #FFE914
deuteranopia · #FFEA50
tritanopia · #EBE8D4

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. #ddf640 is pinned to step 500; the rest hold its hue and let saturation ease off at the extremes so the pale end never turns neon.

#FBFDF2
#F8FBE5
#F1F9C3
#ECFA94
#E2F75E
#ddf640
#CBEA0B
#A9C309
#889C07
#62700A
#3E4606
Base = 500Lightest = 50 · #FBFDF2Darkest = 950 · #3E4606Text 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 0.049 117.3);
  --brand-100: oklch(0.94 0.078 117.3);
  --brand-200: oklch(0.88 0.117 117.3);
  --brand-300: oklch(0.80 0.152 117.3);
  --brand-400: oklch(0.72 0.180 117.3);
  --brand-500: oklch(0.64 0.195 117.3);
  --brand-600: oklch(0.56 0.195 117.3);
  --brand-700: oklch(0.48 0.183 117.3);
  --brand-800: oklch(0.40 0.164 117.3);
  --brand-900: oklch(0.32 0.137 117.3);
  --brand-950: oklch(0.24 0.107 117.3);
}

Colors that work with #ddf640

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#E7EDC0
Hairlines and dividers
Muted text#909B4B
Captions on the surface
Accent#3C52FA
Second voice, not a rival
Dark variant#6A7A06
Hover, pressed, headers
Light variant#FBFEE7
Selected rows, tints
Dark surface#222414
Dark-mode background
Hover#D7F41E
One step down in lightness
Pressed#C6E40B
Two steps down
Disabled#DADDC9
Chroma pulled out
Focus ring#E6FF4B
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 #ddf640

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
  • 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 #6A7A06
Safe as a 1px border on white
No — use #879B07

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 mid lightness keeps it versatile in both themes.

Worth knowing

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

Reads as
  • FormalityLow
  • EnergyHigh
  • Weight39/100
  • 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#5940F6
Analogous left#F6B440
Analogous right#82F640
Split-complement 1#4082F6
Split-complement 2#B440F6
Triadic 1#40DDF6
Triadic 2#F640DD
Tetradic#40F6B4
On the wheel
Base+30°−30°+120°+240°+180°68°

#ddf640 sits at 68°. Every dot is a harmony position and links to its own page in the table alongside.

RGB percentages

Red86.7%
Green96.5%
Blue25.1%
R · 0–255
221
0xdd
G · 0–255
246
0xf6
B · 0–255
64
0x40

CMYK percentages

Cyan10.2%
Magenta0.0%
Yellow74.0%
Key (black)3.5%

Total ink coverage is 88%. Most commercial presses cap around 300% — above that, sheets stop drying properly.

Color previews

#ddf640 text on a black background

contrast 17.33:1

Card sample

#ddf640 text on a white background

contrast 1.21:1

Card sample

#ddf640 on grey

1.11:1

#ddf640 on its own surface

1.16:1

#ddf640 on its dark surface

13.03:1

CSS3 live lab

Text font color

The quick brown fox

color: #ddf640;
Background color
Panel with #ddf640 background
background-color: #ddf640;
Text shadow — hex

Glowing headline

text-shadow: 2px 2px 8px #ddf640;
Text shadow — RGB

Soft neon halo

text-shadow: 0 0 14px rgba(221, 246, 64, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(221, 246, 64, 0.45);
Border & gradient
Gradient panel
border: 3px solid #ddf640;
background: linear-gradient(135deg, #ddf640, #64F640);
Gradient text

Gradient headline

background: linear-gradient(90deg, #ddf640, #40F64A);
-webkit-background-clip: text;
color: transparent;
Focus ring
Focused control
outline: 2px solid #ddf640;
outline-offset: 3px;
Underline & caret

Marked up text

text-decoration-color: #ddf640;
caret-color: #ddf640;
Left rule
Pull quote or callout
border-left: 4px solid #ddf640;
Ring + tint
Selected chip
background: #FBFEE7;
box-shadow: inset 0 0 0 2px #ddf640;
Conic badge
68%
background: conic-gradient(#ddf640 68%, #e2e8f0 0);

Transparency

What each alpha value actually composites to. The top row is #ddf640 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(221, 246, 64, 0.5)
rgb(221 246 64 / 50%)
#ddf64080
hsl(68 91% 61% / 50%)
color-mix(in srgb, #ddf640 50%, transparent)
Alpha8-digit hexFlat on white
10%#ddf6401a#FCFEEC
20%#ddf64033#F8FDD9
40%#ddf64066#F1FBB3
60%#ddf64099#EBFA8C
80%#ddf640cc#E4F866

Gradients from #ddf640

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, #E8F97B, #ddf640 45%, #6A7A06);
Duotone
A short hue run reads richer than a flat fill
background: linear-gradient(120deg, #ddf640, #3BF523);
Complement sweep
Loud — keep it behind large type only
background: linear-gradient(90deg, #ddf640, #5940F6);
Spotlight
Hero panels and app headers
background: radial-gradient(120% 120% at 20% 0%, #EDFA98 0%, #ddf640 45%, #6A7A06 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%, #F8BC71 0%, transparent 60%), radial-gradient(55% 55% at 85% 15%, #88F75D 0%, transparent 60%), radial-gradient(70% 70% at 50% 95%, #6A7A06 0%, transparent 65%), #ddf640;

Monochromatic scale

Palettes built from #ddf640

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.

#ddf640 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 17.33:1.

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.

#ddf640, answered

What color is #ddf640?

#ddf640 is a balanced electric yellow, closest to Yellow (ΔE2000 7). It sits at 68° on the hue wheel with 91% saturation and 61% lightness, which reads as warm.

What is the RGB value of #ddf640?

rgb(221, 246, 64) — 221 red, 246 green and 64 blue out of 255, or 86.7% / 96.5% / 25.1% by channel.

What is #ddf640 in HSL and HSV?

hsl(68, 91%, 61%) and hsv(68, 74%, 96%). HSL is what CSS takes; HSV is what your design tool's picker shows, which is why the saturation numbers rarely match.

Is #ddf640 a light or a dark color?

It is a light color. Relative luminance is 0.8165 and perceived brightness is 88%, so black text on it reaches 17.33:1.

Should I use black or white text on #ddf640?

Black. It scores 17.33:1 against #ddf640, versus 1.21:1 for white — AAA at any size.

Is #ddf640 accessible on a white background?

#ddf640 on white scores 1.21:1, which fails WCAG AA at every size. Darken it to #6D7E06 to reach 4.5:1, or #505C04 for 7:1.

What is the complementary color of #ddf640?

#5940F6 sits directly opposite on the wheel. Softer options are the split-complements #4082F6 and #B440F6, which give the same contrast with far less vibration.

What colors go well with #ddf640?

For interface work: #FAFAF4 as the surface, #E7EDC0 for borders, #909B4B for secondary text, #3C52FA as an accent and #6A7A06 for hover and pressed states. For a palette, the analogous pair #F6B440 and #82F640 stays calm, while #5940F6 is the loudest partner.

What is #ddf640 in CMYK for printing?

cmyk(10%, 0%, 74%, 4%). 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 #ddf640 warm or cool?

Warm — it scores 32 on a scale where 0 is the warmest orange and 100 the coolest azure. Nudged warmer it becomes #F6CC40; nudged cooler, #9AF83E.

Which Tailwind color is closest to #ddf640?

The lime family — its 500 step is #84cc16, ΔE2000 14.1 away. That is a visible difference, so define #ddf640 as a custom token rather than reaching for the built-in.

How do I use #ddf640 in Tailwind CSS?

Inline it as an arbitrary value with bg-[#ddf640] or text-[#ddf640], 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 #ddf640 with 50% opacity?

rgba(221, 246, 64, 0.5), or #ddf64080 in eight-digit hex. Over white that composites to #EEFBA0; over black, #6F7B20.

Is #ddf640 a web-safe color?

No. The nearest web-safe colour is #CCFF33, ΔE2000 4.2 away. The palette only matters for legacy displays and some email clients now.

What does the color #ddf640 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 #ddf640?

The safest is same-hue elevation: linear-gradient(135deg, #E8F97B, #ddf640 45%, #6A7A06). For more colour, a short hue run to #3BF523 keeps it rich without turning muddy.

Work with #ddf640 in the Color Lab

Every tool opens with this colour already loaded.

Every value on this page is computed from #ddf640 at request time — conversions, contrast ratios and ΔE distances are calculated, never looked up.