#288FAB#288FAB

#288FAB is a mid, moderate cyan. Relative luminance 0.230; OKLCH L 60.5% C 0.099 H 220.5°. Best body text is #000000 at 5.61:1 contrast (WCAG AA passes).

Color values

HEX	#288FAB
RGB	rgb(40, 143, 171)
HSL	hsl(193, 62%, 41%)
HSV	hsv(193, 77%, 67%)
CMYK	cmyk(76.6%, 16.4%, 0%, 32.9%)
CIE-LAB	lab(55.11, -19.13, -23.01)
CIE-LCH	lch(55.11, 29.92, 230.26°)
OKLab	oklab(60.52% -0.0753 -0.0643)
OKLCH	oklch(60.52% 0.099 220.5)
XYZ	xyz(18.0451, 23.0341, 42.0152)
Luminance	0.2304 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#288FAB #AB4428

analogous

#28AB86 #288FAB #284EAB

triadic

#288FAB #AB288F #8FAB28

tetradic

#288FAB #8628AB #AB4428 #4EAB28

square

#288FAB #8628AB #AB4428 #4EAB28

split-complementary

#288FAB #AB284E #AB8628

monochromatic

#113C48 #1C6679 #288FAB #3EB2D2 #70C6DE

Accessibility & contrast

On white

3.75

#288FAB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.61

#288FAB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #288FAB

5.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##288FAB	#FFFFFF	#000000	##000000
##288FAB	1.00	3.75	5.61	5.61
#FFFFFF	3.75	1.00	21.00	21.00
#000000	5.61	21.00	1.00	1.00
##000000	5.61	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7E8BAC

Deuteranopia (green-blind)

#6C7EAB

Tritanopia (blue-blind)

#009898

Achromatopsia (no color)

#848484

Design tokens & code

CSS

--color: #288fab;
/* rgb */ color: rgb(40, 143, 171);
/* oklch */ color: oklch(60.5% 0.099 220.5);

Tailwind

colors: {
  custom: {
    50: '#77b0c4',
    500: '#288fab',
    950: '#000000',
  },
}

SCSS

$custom: #288fab;
$custom-light: #77b0c4;
$custom-dark: #000000;

JSON

{
  "hex": "#288fab",
  "rgb": {
    "r": 40,
    "g": 143,
    "b": 171
  },
  "hsl": {
    "h": 192.824,
    "s": 62.085,
    "l": 41.373
  },
  "oklch": {
    "l": 0.60522,
    "c": 0.09906,
    "h": 220.5
  },
  "luminance": 0.23036
}

Semantic roles & 50–950 ramp

primary

#288FAB

secondary

#C47E6A

accent

#6543E5

background

#F7FAFC

surface

#EEF4F8

border

#C9CED1

text

#0A1012

muted

#7C7F81

Preview Lab

Preview with #288FAB

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

Preview Lab → · Contrast checker → · Palette generator →