#218DA4#218DA4

#218DA4 is a mid, moderate cyan. Relative luminance 0.221; OKLCH L 59.6% C 0.098 H 216.1°. Best body text is #000000 at 5.41:1 contrast (WCAG AA passes).

Color values

HEX	#218DA4
RGB	rgb(33, 141, 164)
HSL	hsl(191, 66%, 39%)
HSV	hsv(191, 80%, 64%)
CMYK	cmyk(79.9%, 14%, 0%, 35.7%)
CIE-LAB	lab(54.08, -21.19, -20.58)
CIE-LCH	lch(54.08, 29.54, 224.15°)
OKLab	oklab(59.57% -0.0788 -0.0575)
OKLCH	oklch(59.57% 0.098 216.1)
XYZ	xyz(16.8500, 22.0513, 38.4830)
Luminance	0.2205 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#218DA4 #A43821

analogous

#21A479 #218DA4 #214CA4

triadic

#218DA4 #A4218D #8DA421

tetradic

#218DA4 #7921A4 #A43821 #4CA421

square

#218DA4 #7921A4 #A43821 #4CA421

split-complementary

#218DA4 #A4214C #A47921

monochromatic

#0C353E #176171 #218DA4 #2DB7D5 #60C9DF

Accessibility & contrast

On white

3.88

#218DA4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.41

#218DA4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #218DA4

5.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##218DA4	#FFFFFF	#000000	##000000
##218DA4	1.00	3.88	5.41	5.41
#FFFFFF	3.88	1.00	21.00	21.00
#000000	5.41	21.00	1.00	1.00
##000000	5.41	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7D88A5

Deuteranopia (green-blind)

#6C7CA4

Tritanopia (blue-blind)

#009594

Achromatopsia (no color)

#818181

Design tokens & code

CSS

--color: #218da4;
/* rgb */ color: rgb(33, 141, 164);
/* oklch */ color: oklch(59.6% 0.098 216.1);

Tailwind

colors: {
  custom: {
    50: '#73aebf',
    500: '#218da4',
    950: '#000000',
  },
}

SCSS

$custom: #218da4;
$custom-light: #73aebf;
$custom-dark: #000000;

JSON

{
  "hex": "#218da4",
  "rgb": {
    "r": 33,
    "g": 141,
    "b": 164
  },
  "hsl": {
    "h": 190.534,
    "s": 66.497,
    "l": 38.627
  },
  "oklch": {
    "l": 0.59569,
    "c": 0.09758,
    "h": 216.1
  },
  "luminance": 0.22053
}

Semantic roles & 50–950 ramp

primary

#218DA4

secondary

#C46F5D

accent

#5C3EE9

background

#F7FAFB

surface

#EEF4F7

border

#C9CED0

text

#091012

muted

#7B7F81

Preview Lab

Preview with #218DA4

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →