#287E9B#287E9B

#287E9B is a mid, moderate cyan. Relative luminance 0.177; OKLCH L 55.6% C 0.091 H 224.8°. Best body text is #FFFFFF at 4.62:1 contrast (WCAG AA passes).

Color values

HEX	#287E9B
RGB	rgb(40, 126, 155)
HSL	hsl(195, 59%, 38%)
HSV	hsv(195, 74%, 61%)
CMYK	cmyk(74.2%, 18.7%, 0%, 39.2%)
CIE-LAB	lab(49.18, -15.31, -22.88)
CIE-LCH	lch(49.18, 27.53, 236.21°)
OKLab	oklab(55.55% -0.0644 -0.0641)
OKLCH	oklch(55.55% 0.091 224.8)
XYZ	xyz(14.2499, 17.7377, 33.6767)
Luminance	0.1774 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#287E9B #9B4528

analogous

#289B7E #287E9B #28459B

triadic

#287E9B #9B287E #7E9B28

tetradic

#287E9B #7E289B #9B4528 #459B28

square

#287E9B #7E289B #9B4528 #459B28

split-complementary

#287E9B #9B2845 #9B7E28

monochromatic

#0F2F3A #1B566A #287E9B #35A5CB #66BBD7

Accessibility & contrast

On white

4.62

#287E9B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.55

#287E9B on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #287E9B

4.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##287E9B	#FFFFFF	#000000	##FFFFFF
##287E9B	1.00	4.62	4.55	4.62
#FFFFFF	4.62	1.00	21.00	1.00
#000000	4.55	21.00	1.00	21.00
##FFFFFF	4.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#6E7B9C

Deuteranopia (green-blind)

#5E709B

Tritanopia (blue-blind)

#008787

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #287e9b;
/* rgb */ color: rgb(40, 126, 155);
/* oklch */ color: oklch(55.6% 0.091 224.8);

Tailwind

colors: {
  custom: {
    50: '#73a3b8',
    500: '#287e9b',
    950: '#000000',
  },
}

SCSS

$custom: #287e9b;
$custom-light: #73a3b8;
$custom-dark: #000000;

JSON

{
  "hex": "#287e9b",
  "rgb": {
    "r": 40,
    "g": 126,
    "b": 155
  },
  "hsl": {
    "h": 195.13,
    "s": 58.974,
    "l": 38.235
  },
  "oklch": {
    "l": 0.55552,
    "c": 0.09088,
    "h": 224.8
  },
  "luminance": 0.17739
}

Semantic roles & 50–950 ramp

primary

#287E9B

secondary

#BD7961

accent

#6D46E2

background

#F7FAFB

surface

#EDF3F6

border

#C8CDD0

text

#090F11

muted

#7B7F80

Preview Lab

Preview with #287E9B

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

Preview Lab → · Contrast checker → · Palette generator →