#288AB3#288AB3

#288AB3 is a mid, moderate cyan. Relative luminance 0.219; OKLCH L 59.7% C 0.107 H 230.9°. Best body text is #000000 at 5.38:1 contrast (WCAG AA passes).

Color values

HEX	#288AB3
RGB	rgb(40, 138, 179)
HSL	hsl(198, 63%, 43%)
HSV	hsv(198, 78%, 70%)
CMYK	cmyk(77.7%, 22.9%, 0%, 29.8%)
CIE-LAB	lab(53.90, -13.65, -29.45)
CIE-LCH	lch(53.90, 32.46, 245.14°)
OKLab	oklab(59.66% -0.0674 -0.0829)
OKLCH	oklch(59.66% 0.107 230.9)
XYZ	xyz(18.0969, 21.8806, 45.9087)
Luminance	0.2188 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#288AB3 #B35128

analogous

#28B396 #288AB3 #2844B3

triadic

#288AB3 #B3288A #8AB328

tetradic

#288AB3 #9628B3 #B35128 #44B328

square

#288AB3 #9628B3 #B35128 #44B328

split-complementary

#288AB3 #B32844 #B39628

monochromatic

#123D4F #1D6381 #288AB3 #43AAD5 #75C1E0

Accessibility & contrast

On white

3.91

#288AB3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.38

#288AB3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #288AB3

5.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##288AB3	#FFFFFF	#000000	##000000
##288AB3	1.00	3.91	5.38	5.38
#FFFFFF	3.91	1.00	21.00	21.00
#000000	5.38	21.00	1.00	1.00
##000000	5.38	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7588B5

Deuteranopia (green-blind)

#637BB2

Tritanopia (blue-blind)

#009598

Achromatopsia (no color)

#818181

Design tokens & code

CSS

--color: #288ab3;
/* rgb */ color: rgb(40, 138, 179);
/* oklch */ color: oklch(59.7% 0.107 230.9);

Tailwind

colors: {
  custom: {
    50: '#77acca',
    500: '#288ab3',
    950: '#000000',
  },
}

SCSS

$custom: #288ab3;
$custom-light: #77acca;
$custom-dark: #000000;

JSON

{
  "hex": "#288ab3",
  "rgb": {
    "r": 40,
    "g": 138,
    "b": 179
  },
  "hsl": {
    "h": 197.698,
    "s": 63.47,
    "l": 42.941
  },
  "oklch": {
    "l": 0.59664,
    "c": 0.1068,
    "h": 230.9
  },
  "luminance": 0.21883
}

Semantic roles & 50–950 ramp

primary

#288AB3

secondary

#C8896F

accent

#7241E6

background

#F7FAFC

surface

#EEF4F8

border

#C9CED1

text

#0A1013

muted

#7C7F82

Preview Lab

Preview with #288AB3

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

Preview Lab → · Contrast checker → · Palette generator →