#288BA3#288BA3

#288BA3 is a mid, moderate cyan. Relative luminance 0.216; OKLCH L 59.2% C 0.094 H 217.9°. Best body text is #000000 at 5.31:1 contrast (WCAG AA passes).

Color values

HEX	#288BA3
RGB	rgb(40, 139, 163)
HSL	hsl(192, 61%, 40%)
HSV	hsv(192, 75%, 64%)
CMYK	cmyk(75.5%, 14.7%, 0%, 36.1%)
CIE-LAB	lab(53.56, -19.67, -20.79)
CIE-LCH	lch(53.56, 28.63, 226.58°)
OKLab	oklab(59.17% -0.0745 -0.0581)
OKLCH	oklch(59.17% 0.094 217.9)
XYZ	xyz(16.7158, 21.5587, 37.9235)
Luminance	0.2156 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#288BA3 #A34028

analogous

#28A37D #288BA3 #284EA3

triadic

#288BA3 #A3288B #8BA328

tetradic

#288BA3 #7D28A3 #A34028 #4EA328

square

#288BA3 #7D28A3 #A34028 #4EA328

split-complementary

#288BA3 #A3284E #A37D28

monochromatic

#103741 #1C6172 #288BA3 #3AB2CF #6BC5DB

Accessibility & contrast

On white

3.95

#288BA3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.31

#288BA3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #288BA3

5.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##288BA3	#FFFFFF	#000000	##000000
##288BA3	1.00	3.95	5.31	5.31
#FFFFFF	3.95	1.00	21.00	21.00
#000000	5.31	21.00	1.00	1.00
##000000	5.31	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7C87A4

Deuteranopia (green-blind)

#6B7BA3

Tritanopia (blue-blind)

#009393

Achromatopsia (no color)

#808080

Design tokens & code

CSS

--color: #288ba3;
/* rgb */ color: rgb(40, 139, 163);
/* oklch */ color: oklch(59.2% 0.094 217.9);

Tailwind

colors: {
  custom: {
    50: '#75adbe',
    500: '#288ba3',
    950: '#000000',
  },
}

SCSS

$custom: #288ba3;
$custom-light: #75adbe;
$custom-dark: #000000;

JSON

{
  "hex": "#288ba3",
  "rgb": {
    "r": 40,
    "g": 139,
    "b": 163
  },
  "hsl": {
    "h": 191.707,
    "s": 60.591,
    "l": 39.804
  },
  "oklch": {
    "l": 0.59172,
    "c": 0.09447,
    "h": 217.9
  },
  "luminance": 0.21561
}

Semantic roles & 50–950 ramp

primary

#288BA3

secondary

#C17866

accent

#6344E4

background

#F7FAFB

surface

#EEF4F6

border

#C9CED0

text

#0A1012

muted

#7C7F81

Preview Lab

Preview with #288BA3

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

Preview Lab → · Contrast checker → · Palette generator →