#288EA3#288EA3

#288EA3 is a mid, moderate cyan. Relative luminance 0.224; OKLCH L 59.9% C 0.095 H 214.8°. Best body text is #000000 at 5.49:1 contrast (WCAG AA passes).

Color values

HEX	#288EA3
RGB	rgb(40, 142, 163)
HSL	hsl(190, 61%, 40%)
HSV	hsv(190, 75%, 64%)
CMYK	cmyk(75.5%, 12.9%, 0%, 36.1%)
CIE-LAB	lab(54.49, -21.26, -19.36)
CIE-LCH	lch(54.49, 28.76, 222.32°)
OKLab	oklab(59.92% -0.0776 -0.054)
OKLCH	oklch(59.92% 0.095 214.8)
XYZ	xyz(17.1561, 22.4394, 38.0703)
Luminance	0.2244 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#288EA3 #A33D28

analogous

#28A37B #288EA3 #2851A3

triadic

#288EA3 #A3288E #8EA328

tetradic

#288EA3 #7B28A3 #A33D28 #51A328

square

#288EA3 #7B28A3 #A33D28 #51A328

split-complementary

#288EA3 #A32851 #A37B28

monochromatic

#103841 #1C6372 #288EA3 #3AB5CF #6BC8DB

Accessibility & contrast

On white

3.83

#288EA3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.49

#288EA3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #288EA3

5.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##288EA3	#FFFFFF	#000000	##000000
##288EA3	1.00	3.83	5.49	5.49
#FFFFFF	3.83	1.00	21.00	21.00
#000000	5.49	21.00	1.00	1.00
##000000	5.49	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7F89A4

Deuteranopia (green-blind)

#6E7DA3

Tritanopia (blue-blind)

#009695

Achromatopsia (no color)

#828282

Design tokens & code

CSS

--color: #288ea3;
/* rgb */ color: rgb(40, 142, 163);
/* oklch */ color: oklch(59.9% 0.095 214.8);

Tailwind

colors: {
  custom: {
    50: '#75afbe',
    500: '#288ea3',
    950: '#000000',
  },
}

SCSS

$custom: #288ea3;
$custom-light: #75afbe;
$custom-dark: #000000;

JSON

{
  "hex": "#288ea3",
  "rgb": {
    "r": 40,
    "g": 142,
    "b": 163
  },
  "hsl": {
    "h": 190.244,
    "s": 60.591,
    "l": 39.804
  },
  "oklch": {
    "l": 0.59924,
    "c": 0.09451,
    "h": 214.8
  },
  "luminance": 0.22441
}

Semantic roles & 50–950 ramp

primary

#288EA3

secondary

#C17566

accent

#5F44E4

background

#F7FAFB

surface

#EEF4F6

border

#C9CED0

text

#0A1012

muted

#7C7F81

Preview Lab

Preview with #288EA3

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

Preview Lab → · Contrast checker → · Palette generator →