Color reference

#99EEFF color reference

Soft Very Light Cyan-blue

This is a soft, very light cyan-blue under the deterministic OKLCH hue, lightness, and chroma ranges. Its closest standardized CSS named color is Pale Turquoise (#AFEEEE), measured with straight-line OKLab distance.

Descriptive label
Soft Very Light Cyan-blue
Recommended text
Black · 16.03:1
Relative luminance
0.751414
Build a palette from #99EEFF in Palette Generator Convert #99EEFF in Color Converter
Formats UI preview Contrast 50–900 scale Harmonies Matches Related colors Color vision Exports

Copyable values

#99EEFF in common color formats

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

Color conversions for #99EEFF
Format Value Action
HEX #99EEFF
RGB rgb(153 238 255)
HSL hsl(190 100% 80%)
HSV hsv(190 40% 100%)
HWB hwb(190 60% 0%)
XYZ D65 color(xyz-d65 0.617579 0.751392 1.058601)
LAB lab(89.1313% -23.6338 -16.8166)
LCH lch(89.1313% 29.0061 215.4337)
OKLAB oklab(90.081% -0.072625 -0.044766)
OKLCH oklch(90.081% 0.085313 211.6495)

Real-world test

Try #99EEFF 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 #99EEFF with black text at 16.03:1.

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: 1.31:1 · does not meet 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 #99EEFF Exact pair assessment Results for source text on white appear below.

On white

1.31:1

  • Fail AA normal text · 4.5:1
  • Fail AAA normal text · 7:1
  • Fail AA large text · 3:1
  • Fail UI/non-text where applicable · 3:1
Source #99EEFF Exact pair assessment Results for source text on black appear below.

On black

16.03:1

  • Pass AA normal text · 4.5:1
  • Pass 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

#99EEFF 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 1.25:1. 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 #99EEFF at 16.03:1. This validates only that text pair, not hover, focus, disabled, or adjacent-color states.

Distinctive accent

Palette role

Its OKLCH chroma of 0.0853 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 16.03:1. Always retest against the actual rendered background and text size.

Tested backgrounds

Foreground pairing comparison

#99EEFF foreground contrast on tested backgrounds
Pair Background Contrast ratio
Black#000000 16.03:1
Hue Codex ink#10212B 12.58:1
White#FFFFFF 1.31:1
Hue Codex paper#FBFAF5 1.25:1
Soft neutral#F2EFE6 1.14:1
Check #99EEFF 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 #99EEFF Source
200
300
400
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 #99EEFF 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 #99EEFF
Complement Chroma fitted to sRGB

Analogous

Source #99EEFF
Analogous −30°
Analogous +30° Chroma fitted to sRGB

Triadic

Source #99EEFF
Triad +120° Chroma fitted to sRGB
Triad +240°

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 Soft Very Light Cyan-blue
Complement
Explore #99EEFF 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

Pale Turquoise

#AFEEEE

OKLab distance ×100: 3.03

Tailwind v4 default

cyan-200

oklch(91.7% 0.08 205.041)

OKLab distance ×100: 1.95 · sRGB preview #A2F4FD

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#99EEFF
Approx.

Protanopia

Red-vision deficiency approximation

Original#99EEFF
Approx.

Deuteranopia

Green-vision deficiency approximation

Original#99EEFF
Approx.

Tritanopia

Blue-yellow deficiency approximation

Original#99EEFF
Approx.

Achromatopsia

Monochromatic-vision approximation

Test #99EEFF 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: #99EEFF;
  --color-on-primary: #000000;
  --color-primary-oklch: oklch(90.081% 0.085313 211.6495);
  --color-primary-50: #E3FAFF;
  --color-primary-100: #99EEFF;
  --color-primary-200: #81D3E3;
  --color-primary-300: #69B9C8;
  --color-primary-400: #529FAE;
  --color-primary-500: #3B8695;
  --color-primary-600: #226E7C;
  --color-primary-700: #015764;
  --color-primary-800: #004049;
  --color-primary-900: #002A31;
}

Tailwind v4 CSS-first theme

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

@import "tailwindcss";

@theme {
  --color-brand: #99EEFF;
  --color-brand-foreground: #000000;
  --color-brand-50: #E3FAFF;
  --color-brand-100: #99EEFF;
  --color-brand-200: #81D3E3;
  --color-brand-300: #69B9C8;
  --color-brand-400: #529FAE;
  --color-brand-500: #3B8695;
  --color-brand-600: #226E7C;
  --color-brand-700: #015764;
  --color-brand-800: #004049;
  --color-brand-900: #002A31;
}

Tailwind v3 / legacy config

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

module.exports = {
  theme: {
    extend: {
      colors: {
        brand: {
          '50': '#E3FAFF',
          '100': '#99EEFF',
          '200': '#81D3E3',
          '300': '#69B9C8',
          '400': '#529FAE',
          '500': '#3B8695',
          '600': '#226E7C',
          '700': '#015764',
          '800': '#004049',
          '900': '#002A31',
          DEFAULT: '#99EEFF',
          foreground: '#000000',
        },
      },
    },
  },
};

Sass variables

Semantic source, foreground, OKLCH, and scale variables.

$color-primary: #99EEFF;
$color-on-primary: #000000;
$color-primary-oklch: oklch(90.081% 0.085313 211.6495);
$color-primary-50: #E3FAFF;
$color-primary-100: #99EEFF;
$color-primary-200: #81D3E3;
$color-primary-300: #69B9C8;
$color-primary-400: #529FAE;
$color-primary-500: #3B8695;
$color-primary-600: #226E7C;
$color-primary-700: #015764;
$color-primary-800: #004049;
$color-primary-900: #002A31;

Modern color-mix()

Static fallbacks followed by OKLab tint and shade declarations.

:root {
  --color-primary: #99EEFF;
  --color-primary-tint: #81D3E3;
  --color-primary-tint: color-mix(in oklab, var(--color-primary) 72%, white);
  --color-primary-shade: #015764;
  --color-primary-shade: color-mix(in oklab, var(--color-primary) 82%, black);
}

JSON design data

Source formats, readable text, and the generated scale.

{
    "name": "Soft Very Light Cyan-blue",
    "hex": "#99EEFF",
    "rgb": "rgb(153 238 255)",
    "oklch": "oklch(90.081% 0.085313 211.6495)",
    "recommendedText": "#000000",
    "scale": {
        "50": "#E3FAFF",
        "100": "#99EEFF",
        "200": "#81D3E3",
        "300": "#69B9C8",
        "400": "#529FAE",
        "500": "#3B8695",
        "600": "#226E7C",
        "700": "#015764",
        "800": "#004049",
        "900": "#002A31"
    }
}

Continue the decision

Use #99EEFF 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 #99EEFF in Color PickerStart with this exact color and white as the working background for role and accessibility decisions. Build a palette from #99EEFF in Palette GeneratorUse this exact HEX as the seed for a deterministic, role-based palette. Check #99EEFF on white in Contrast CheckerStart with this color as the foreground and white as the background, then test the real pair.