#287BB1#287BB1

#287BB1 is a mid, moderate cyan. Relative luminance 0.178; OKLCH L 55.9% C 0.114 H 242.0°. Best body text is #FFFFFF at 4.61:1 contrast (WCAG AA passes).

Color values

HEX	#287BB1
RGB	rgb(40, 123, 177)
HSL	hsl(204, 63%, 43%)
HSV	hsv(204, 77%, 69%)
CMYK	cmyk(77.4%, 30.5%, 0%, 30.6%)
CIE-LAB	lab(49.24, -5.76, -35.59)
CIE-LCH	lch(49.24, 36.05, 260.81°)
OKLab	oklab(55.93% -0.0536 -0.1008)
OKLCH	oklch(55.93% 0.114 242)
XYZ	xyz(15.8907, 17.7895, 44.1827)
Luminance	0.1779 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#287BB1 #B15E28

analogous

#28B1A3 #287BB1 #2836B1

triadic

#287BB1 #B1287B #7BB128

tetradic

#287BB1 #A328B1 #B15E28 #36B128

square

#287BB1 #A328B1 #B15E28 #36B128

split-complementary

#287BB1 #B12836 #B1A328

monochromatic

#11364D #1D587F #287BB1 #429BD4 #74B5E0

Accessibility & contrast

On white

4.61

#287BB1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.56

#287BB1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #287BB1

4.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##287BB1	#FFFFFF	#000000	##FFFFFF
##287BB1	1.00	4.61	4.56	4.61
#FFFFFF	4.61	1.00	21.00	1.00
#000000	4.56	21.00	1.00	21.00
##FFFFFF	4.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#627CB3

Deuteranopia (green-blind)

#4F6FB0

Tritanopia (blue-blind)

#00888E

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #287bb1;
/* rgb */ color: rgb(40, 123, 177);
/* oklch */ color: oklch(55.9% 0.114 242.0);

Tailwind

colors: {
  custom: {
    50: '#76a1c8',
    500: '#287bb1',
    950: '#000000',
  },
}

SCSS

$custom: #287bb1;
$custom-light: #76a1c8;
$custom-dark: #000000;

JSON

{
  "hex": "#287bb1",
  "rgb": {
    "r": 40,
    "g": 123,
    "b": 177
  },
  "hsl": {
    "h": 203.65,
    "s": 63.134,
    "l": 42.549
  },
  "oklch": {
    "l": 0.55928,
    "c": 0.1142,
    "h": 242
  },
  "luminance": 0.17791
}

Semantic roles & 50–950 ramp

primary

#287BB1

secondary

#C7916E

accent

#8242E6

background

#F7F9FC

surface

#EEF2F8

border

#C9CCD1

text

#0A0E13

muted

#7C7E82

Preview Lab

Preview with #287BB1

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

Preview Lab → · Contrast checker → · Palette generator →