Color reference

#FF21EF color reference

Vivid Light Magenta

This is a vivid, light magenta under the deterministic OKLCH hue, lightness, and chroma ranges. Its closest standardized CSS named color is Fuchsia (#FF00FF), measured with straight-line OKLab distance.

Descriptive label
Vivid Light Magenta
Recommended text
Black · 6.72:1
Relative luminance
0.285797
Build a palette from #FF21EF in Palette Generator Convert #FF21EF in Color Converter
Formats UI preview Contrast 50–900 scale Harmonies Matches Related colors Color vision Exports

Copyable values

#FF21EF in common color formats

Values are calculated from the same opaque sRGB color. Display rounding does not alter the internal calculations.

Color conversions for #FF21EF
Format Value Action
HEX #FF21EF
RGB rgb(255 33 239)
HSL hsl(304 100% 56.47%)
HSV hsv(304 87.06% 100%)
HWB hwb(304 12.94% 0%)
XYZ D65 color(xyz-d65 0.573612 0.285829 0.841602)
LAB lab(60.4021% 89.1764 -51.2434)
LCH lch(60.4021% 102.851 330.1171)
OKLAB oklab(69.9478% 0.267392 -0.142925)
OKLCH oklch(69.9478% 0.303193 331.8748)

Real-world test

Try #FF21EF on interface components

Preview the source as a primary action, subtle status, form treatment, and card surface. Persistent state controls help touch and keyboard users inspect the same normal, hover, and active colors.

Normal state uses #FF21EF with black text at 6.72:1.

Action

Primary button

Use the controls above or point to and press the button to inspect its visual states.

Status

Subtle alert badge

A 12% source tint over white provides the background; readable text is selected separately.

Ready for review

Form

Border and focus ring

Source ring on white: 3.13:1 · meets the 3:1 non-text threshold where applicable.

Surface

Card component

The selected state becomes the card surface with its strongest black-or-white text pairing.

Design system Color decision ready Review states and surrounding surfaces before shipping.

Accessibility diagnostics

WCAG contrast for exact color pairs

Each result applies only to the named foreground, background, text size, and requirement. It is not a complete accessibility or component-conformance claim.

Source #FF21EF Exact pair assessment Results for source text on white appear below.

On white

3.13:1

  • Fail AA normal text · 4.5:1
  • Fail AAA normal text · 7:1
  • Pass AA large text · 3:1
  • Pass UI/non-text where applicable · 3:1
Source #FF21EF Exact pair assessment Results for source text on black appear below.

On black

6.72:1

  • Pass AA normal text · 4.5:1
  • Fail AAA normal text · 7:1
  • Pass AA large text · 3:1
  • Pass UI/non-text where applicable · 3:1

Use guidance

What this color may be suitable for

Not recommended

Normal-sized text

#FF21EF does not reach 4.5:1 on white or Hue Codex paper, so it should not be used there for normal-sized text.

Needs a boundary

Controls and interface graphics

Against Hue Codex paper, the color reaches only 2.99:1. Use a contrasting border or another non-color boundary for meaningful controls and graphics.

Readable pairing available

Colored surface or button fill

Black text provides the stronger black/white pairing on #FF21EF at 6.72:1. This validates only that text pair, not hover, focus, disabled, or adjacent-color states.

Distinctive accent

Palette role

Its OKLCH chroma of 0.3032 gives it enough visual presence for an accent or primary role when the tested foreground and neighboring colors pass.

Pair available

Color used as foreground

The stronger black/white background is black at 6.72:1. Always retest against the actual rendered background and text size.

Tested backgrounds

Foreground pairing comparison

#FF21EF foreground contrast on tested backgrounds
Pair Background Contrast ratio
Black#000000 6.72:1
Hue Codex ink#10212B 5.27:1
White#FFFFFF 3.13:1
Hue Codex paper#FBFAF5 2.99:1
Soft neutral#F2EFE6 2.72:1
Check #FF21EF on another background in Contrast Checker

Design-system starting point

A perceptual 50–900 reference scale

The source color is preserved at the nearest lightness step. Other swatches keep its OKLCH hue, moderate chroma toward the extremes, and reduce chroma only when needed to remain in sRGB.

50
100
200
300
400 #FF21EF Source
500
600
700
800
900

This is a Hue Codex reference scale, not a claim that the values match Tailwind, Material, or another framework’s named palette.

Adjust the #FF21EF scale in Tints, Shades & Tones

Color relationships

Complementary, analogous, and triadic colors

Hue rotations use OKLCH while preserving lightness and requested chroma. When a rotated result falls outside sRGB, chroma is reduced deterministically and disclosed.

Complementary

Source #FF21EF
Complement Chroma fitted to sRGB

Analogous

Source #FF21EF
Analogous −30° Chroma fitted to sRGB
Analogous +30° Chroma fitted to sRGB

Triadic

Source #FF21EF
Triad +120° Chroma fitted to sRGB
Triad +240° Chroma fitted to sRGB

Applied pairing

A small interface check

The source anchors the main action while the complement marks a secondary status. Contrast is selected separately for each fill.

Project color Vivid Light Magenta
Complement
Explore #FF21EF in Color Harmonies

Distance matching

Closest standardized and framework colors

Matches use straight-line OKLab distance ×100. A smaller value means the coordinates are closer in this model; it is not a claim that two tokens are interchangeable in a design system.

CSS named color

Fuchsia

#FF00FF

OKLab distance ×100: 2.73

Tailwind v4 default

fuchsia-500

oklch(66.7% 0.295 322.15)

OKLab distance ×100: 6.08 · sRGB preview #E12AFB

Print boundary

Pantone match not estimated

Reliable print matching needs licensed reference data plus a defined ink, paper, profile, and viewing condition.

Read the print methodology

Color-vision screening

Approximate color-vision-deficiency views

These encoded-sRGB matrix previews are screening approximations. They help reveal possible color-only distinctions but do not reproduce every person’s vision or establish accessibility conformance.

Original#FF21EF
Approx.

Protanopia

Red-vision deficiency approximation

Original#FF21EF
Approx.

Deuteranopia

Green-vision deficiency approximation

Original#FF21EF
Approx.

Tritanopia

Blue-yellow deficiency approximation

Original#FF21EF
Approx.#7B7B7B

Achromatopsia

Monochromatic-vision approximation

Test #FF21EF with a complete palette in the CVD Simulator

Ready to use

Copy framework-ready color tokens

Exports preserve the source, readable foreground, and generated 50–900 scale. Tailwind v4 CSS-first and Tailwind v3 JavaScript-config formats are labeled separately.

CSS custom properties

Semantic aliases and the complete 50–900 scale.

:root {
  --color-primary: #FF21EF;
  --color-on-primary: #000000;
  --color-primary-oklch: oklch(69.9478% 0.303193 331.8748);
  --color-primary-50: #FFF0FC;
  --color-primary-100: #FFCBF6;
  --color-primary-200: #FF9BF2;
  --color-primary-300: #FF5DEF;
  --color-primary-400: #FF21EF;
  --color-primary-500: #CA00BD;
  --color-primary-600: #A5009A;
  --color-primary-700: #820079;
  --color-primary-800: #61005A;
  --color-primary-900: #41003C;
}

Tailwind v4 CSS-first theme

Current @theme syntax for bg-brand, text-brand, and scale utilities.

@import "tailwindcss";

@theme {
  --color-brand: #FF21EF;
  --color-brand-foreground: #000000;
  --color-brand-50: #FFF0FC;
  --color-brand-100: #FFCBF6;
  --color-brand-200: #FF9BF2;
  --color-brand-300: #FF5DEF;
  --color-brand-400: #FF21EF;
  --color-brand-500: #CA00BD;
  --color-brand-600: #A5009A;
  --color-brand-700: #820079;
  --color-brand-800: #61005A;
  --color-brand-900: #41003C;
}

Tailwind v3 / legacy config

CommonJS theme.extend.colors for JavaScript-config projects.

module.exports = {
  theme: {
    extend: {
      colors: {
        brand: {
          '50': '#FFF0FC',
          '100': '#FFCBF6',
          '200': '#FF9BF2',
          '300': '#FF5DEF',
          '400': '#FF21EF',
          '500': '#CA00BD',
          '600': '#A5009A',
          '700': '#820079',
          '800': '#61005A',
          '900': '#41003C',
          DEFAULT: '#FF21EF',
          foreground: '#000000',
        },
      },
    },
  },
};

Sass variables

Semantic source, foreground, OKLCH, and scale variables.

$color-primary: #FF21EF;
$color-on-primary: #000000;
$color-primary-oklch: oklch(69.9478% 0.303193 331.8748);
$color-primary-50: #FFF0FC;
$color-primary-100: #FFCBF6;
$color-primary-200: #FF9BF2;
$color-primary-300: #FF5DEF;
$color-primary-400: #FF21EF;
$color-primary-500: #CA00BD;
$color-primary-600: #A5009A;
$color-primary-700: #820079;
$color-primary-800: #61005A;
$color-primary-900: #41003C;

Modern color-mix()

Static fallbacks followed by OKLab tint and shade declarations.

:root {
  --color-primary: #FF21EF;
  --color-primary-tint: #FF9BF2;
  --color-primary-tint: color-mix(in oklab, var(--color-primary) 72%, white);
  --color-primary-shade: #820079;
  --color-primary-shade: color-mix(in oklab, var(--color-primary) 82%, black);
}

JSON design data

Source formats, readable text, and the generated scale.

{
    "name": "Vivid Light Magenta",
    "hex": "#FF21EF",
    "rgb": "rgb(255 33 239)",
    "oklch": "oklch(69.9478% 0.303193 331.8748)",
    "recommendedText": "#000000",
    "scale": {
        "50": "#FFF0FC",
        "100": "#FFCBF6",
        "200": "#FF9BF2",
        "300": "#FF5DEF",
        "400": "#FF21EF",
        "500": "#CA00BD",
        "600": "#A5009A",
        "700": "#820079",
        "800": "#61005A",
        "900": "#41003C"
    }
}

Continue the decision

Use #FF21EF in a complete workflow

Reference values are a starting point. Test the color in its real role, background, states, typography, and surrounding palette before shipping.

Adjust #FF21EF in Color PickerStart with this exact color and white as the working background for role and accessibility decisions. Build a palette from #FF21EF in Palette GeneratorUse this exact HEX as the seed for a deterministic, role-based palette. Check #FF21EF on white in Contrast CheckerStart with this color as the foreground and white as the background, then test the real pair.