#288CB4#288CB4

#288CB4 is a mid, moderate cyan. Relative luminance 0.225; OKLCH L 60.2% C 0.107 H 229.8°. Best body text is #000000 at 5.50:1 contrast (WCAG AA passes).

Color values

HEX	#288CB4
RGB	rgb(40, 140, 180)
HSL	hsl(197, 64%, 43%)
HSV	hsv(197, 78%, 71%)
CMYK	cmyk(77.8%, 22.2%, 0%, 29.4%)
CIE-LAB	lab(54.55, -14.41, -29.01)
CIE-LCH	lch(54.55, 32.39, 243.59°)
OKLab	oklab(60.2% -0.0689 -0.0816)
OKLCH	oklch(60.2% 0.107 229.8)
XYZ	xyz(18.4880, 22.5003, 46.5398)
Luminance	0.2250 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#288CB4 #B45028

analogous

#28B496 #288CB4 #2846B4

triadic

#288CB4 #B4288C #8CB428

tetradic

#288CB4 #9628B4 #B45028 #46B428

square

#288CB4 #9628B4 #B45028 #46B428

split-complementary

#288CB4 #B42846 #B49628

monochromatic

#123E50 #1D6582 #288CB4 #44ACD5 #76C2E1

Accessibility & contrast

On white

3.82

#288CB4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.50

#288CB4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #288CB4

5.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##288CB4	#FFFFFF	#000000	##000000
##288CB4	1.00	3.82	5.50	5.50
#FFFFFF	3.82	1.00	21.00	21.00
#000000	5.50	21.00	1.00	1.00
##000000	5.50	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#778AB6

Deuteranopia (green-blind)

#657DB3

Tritanopia (blue-blind)

#009799

Achromatopsia (no color)

#828282

Design tokens & code

CSS

--color: #288cb4;
/* rgb */ color: rgb(40, 140, 180);
/* oklch */ color: oklch(60.2% 0.107 229.8);

Tailwind

colors: {
  custom: {
    50: '#78adca',
    500: '#288cb4',
    950: '#000000',
  },
}

SCSS

$custom: #288cb4;
$custom-light: #78adca;
$custom-dark: #000000;

JSON

{
  "hex": "#288cb4",
  "rgb": {
    "r": 40,
    "g": 140,
    "b": 180
  },
  "hsl": {
    "h": 197.143,
    "s": 63.636,
    "l": 43.137
  },
  "oklch": {
    "l": 0.602,
    "c": 0.1068,
    "h": 229.8
  },
  "luminance": 0.22503
}

Semantic roles & 50–950 ramp

primary

#288CB4

secondary

#C88970

accent

#7041E7

background

#F7FAFC

surface

#EEF4F8

border

#C9CED1

text

#0A1013

muted

#7C7F82

Preview Lab

Preview with #288CB4

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

Preview Lab → · Contrast checker → · Palette generator →