#288B9F#288B9F

#288B9F is a mid, moderate cyan. Relative luminance 0.214; OKLCH L 59.0% C 0.092 H 214.4°. Best body text is #000000 at 5.28:1 contrast (WCAG AA passes).

Color values

HEX	#288B9F
RGB	rgb(40, 139, 159)
HSL	hsl(190, 60%, 39%)
HSV	hsv(190, 75%, 62%)
CMYK	cmyk(74.8%, 12.6%, 0%, 37.6%)
CIE-LAB	lab(53.40, -21.00, -18.72)
CIE-LCH	lch(53.40, 28.13, 221.71°)
OKLab	oklab(59% -0.0762 -0.0522)
OKLCH	oklch(59% 0.092 214.4)
XYZ	xyz(16.3630, 21.4176, 36.0658)
Luminance	0.2142 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#288B9F #9F3C28

analogous

#289F78 #288B9F #28509F

triadic

#288B9F #9F288B #8B9F28

tetradic

#288B9F #78289F #9F3C28 #509F28

square

#288B9F #78289F #9F3C28 #509F28

split-complementary

#288B9F #9F2850 #9F7828

monochromatic

#0F363D #1C606E #288B9F #37B4CD #68C6D9

Accessibility & contrast

On white

3.97

#288B9F on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.28

#288B9F on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #288B9F

5.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##288B9F	#FFFFFF	#000000	##000000
##288B9F	1.00	3.97	5.28	5.28
#FFFFFF	3.97	1.00	21.00	21.00
#000000	5.28	21.00	1.00	1.00
##000000	5.28	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7D86A0

Deuteranopia (green-blind)

#6C7A9F

Tritanopia (blue-blind)

#009391

Achromatopsia (no color)

#808080

Design tokens & code

CSS

--color: #288b9f;
/* rgb */ color: rgb(40, 139, 159);
/* oklch */ color: oklch(59.0% 0.092 214.4);

Tailwind

colors: {
  custom: {
    50: '#75adbb',
    500: '#288b9f',
    950: '#000000',
  },
}

SCSS

$custom: #288b9f;
$custom-light: #75adbb;
$custom-dark: #000000;

JSON

{
  "hex": "#288b9f",
  "rgb": {
    "r": 40,
    "g": 139,
    "b": 159
  },
  "hsl": {
    "h": 190.084,
    "s": 59.799,
    "l": 39.02
  },
  "oklch": {
    "l": 0.58999,
    "c": 0.09233,
    "h": 214.4
  },
  "luminance": 0.2142
}

Semantic roles & 50–950 ramp

primary

#288B9F

secondary

#BF7364

accent

#5F45E3

background

#F7FAFB

surface

#EEF4F6

border

#C9CED0

text

#091011

muted

#7B7F80

Preview Lab

Preview with #288B9F

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

Preview Lab → · Contrast checker → · Palette generator →