#288CA3#288CA3

#288CA3 is a mid, moderate cyan. Relative luminance 0.219; OKLCH L 59.4% C 0.094 H 216.9°. Best body text is #000000 at 5.37:1 contrast (WCAG AA passes).

Color values

HEX	#288CA3
RGB	rgb(40, 140, 163)
HSL	hsl(191, 61%, 40%)
HSV	hsv(191, 75%, 64%)
CMYK	cmyk(75.5%, 14.1%, 0%, 36.1%)
CIE-LAB	lab(53.87, -20.21, -20.32)
CIE-LCH	lch(53.87, 28.65, 225.15°)
OKLab	oklab(59.42% -0.0755 -0.0567)
OKLCH	oklch(59.42% 0.094 216.9)
XYZ	xyz(16.8612, 21.8496, 37.9720)
Luminance	0.2185 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#288CA3 #A33F28

analogous

#28A37D #288CA3 #284EA3

triadic

#288CA3 #A3288C #8CA328

tetradic

#288CA3 #7D28A3 #A33F28 #4EA328

square

#288CA3 #7D28A3 #A33F28 #4EA328

split-complementary

#288CA3 #A3284E #A37D28

monochromatic

#103841 #1C6272 #288CA3 #3AB3CF #6BC6DB

Accessibility & contrast

On white

3.91

#288CA3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.37

#288CA3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #288CA3

5.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##288CA3	#FFFFFF	#000000	##000000
##288CA3	1.00	3.91	5.37	5.37
#FFFFFF	3.91	1.00	21.00	21.00
#000000	5.37	21.00	1.00	1.00
##000000	5.37	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7D88A4

Deuteranopia (green-blind)

#6C7BA3

Tritanopia (blue-blind)

#009493

Achromatopsia (no color)

#818181

Design tokens & code

CSS

--color: #288ca3;
/* rgb */ color: rgb(40, 140, 163);
/* oklch */ color: oklch(59.4% 0.094 216.9);

Tailwind

colors: {
  custom: {
    50: '#75adbe',
    500: '#288ca3',
    950: '#000000',
  },
}

SCSS

$custom: #288ca3;
$custom-light: #75adbe;
$custom-dark: #000000;

JSON

{
  "hex": "#288ca3",
  "rgb": {
    "r": 40,
    "g": 140,
    "b": 163
  },
  "hsl": {
    "h": 191.22,
    "s": 60.591,
    "l": 39.804
  },
  "oklch": {
    "l": 0.59422,
    "c": 0.09445,
    "h": 216.9
  },
  "luminance": 0.21852
}

Semantic roles & 50–950 ramp

primary

#288CA3

secondary

#C17766

accent

#6244E4

background

#F7FAFB

surface

#EEF4F6

border

#C9CED0

text

#0A1012

muted

#7C7F81

Preview Lab

Preview with #288CA3

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

Preview Lab → · Contrast checker → · Palette generator →