#287BB0#287BB0

#287BB0 is a mid, moderate cyan. Relative luminance 0.178; OKLCH L 55.9% C 0.113 H 241.5°. Best body text is #FFFFFF at 4.61:1 contrast (WCAG AA passes).

Color values

HEX	#287BB0
RGB	rgb(40, 123, 176)
HSL	hsl(203, 63%, 42%)
HSV	hsv(203, 77%, 69%)
CMYK	cmyk(77.3%, 30.1%, 0%, 31%)
CIE-LAB	lab(49.19, -6.12, -35.08)
CIE-LCH	lch(49.19, 35.61, 260.10°)
OKLab	oklab(55.87% -0.054 -0.0993)
OKLCH	oklch(55.87% 0.113 241.5)
XYZ	xyz(15.7914, 17.7497, 43.6597)
Luminance	0.1775 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#287BB0 #B05D28

analogous

#28B0A1 #287BB0 #2837B0

triadic

#287BB0 #B0287B #7BB028

tetradic

#287BB0 #A128B0 #B05D28 #37B028

square

#287BB0 #A128B0 #B05D28 #37B028

split-complementary

#287BB0 #B02837 #B0A128

monochromatic

#11354C #1D587E #287BB0 #419BD4 #73B5DF

Accessibility & contrast

On white

4.61

#287BB0 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.55

#287BB0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #287BB0

4.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##287BB0	#FFFFFF	#000000	##FFFFFF
##287BB0	1.00	4.61	4.55	4.61
#FFFFFF	4.61	1.00	21.00	1.00
#000000	4.55	21.00	1.00	21.00
##FFFFFF	4.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#627CB2

Deuteranopia (green-blind)

#506FAF

Tritanopia (blue-blind)

#00888E

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #287bb0;
/* rgb */ color: rgb(40, 123, 176);
/* oklch */ color: oklch(55.9% 0.113 241.5);

Tailwind

colors: {
  custom: {
    50: '#76a1c8',
    500: '#287bb0',
    950: '#000000',
  },
}

SCSS

$custom: #287bb0;
$custom-light: #76a1c8;
$custom-dark: #000000;

JSON

{
  "hex": "#287bb0",
  "rgb": {
    "r": 40,
    "g": 123,
    "b": 176
  },
  "hsl": {
    "h": 203.382,
    "s": 62.963,
    "l": 42.353
  },
  "oklch": {
    "l": 0.55873,
    "c": 0.11305,
    "h": 241.5
  },
  "luminance": 0.17752
}

Semantic roles & 50–950 ramp

primary

#287BB0

secondary

#C6906D

accent

#8242E6

background

#F7F9FC

surface

#EEF2F8

border

#C9CCD1

text

#0A0E13

muted

#7C7E82

Preview Lab

Preview with #287BB0

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

Preview Lab → · Contrast checker → · Palette generator →