#288EB3#288EB3

#288EB3 is a mid, moderate cyan. Relative luminance 0.231; OKLCH L 60.6% C 0.105 H 227.4°. Best body text is #000000 at 5.61:1 contrast (WCAG AA passes).

Color values

HEX	#288EB3
RGB	rgb(40, 142, 179)
HSL	hsl(196, 63%, 43%)
HSV	hsv(196, 78%, 70%)
CMYK	cmyk(77.7%, 20.7%, 0%, 29.8%)
CIE-LAB	lab(55.12, -15.86, -27.56)
CIE-LCH	lch(55.12, 31.79, 240.08°)
OKLab	oklab(60.64% -0.0712 -0.0774)
OKLCH	oklch(60.64% 0.105 227.4)
XYZ	xyz(18.6814, 23.0495, 46.1035)
Luminance	0.2305 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#288EB3 #B34D28

analogous

#28B392 #288EB3 #2849B3

triadic

#288EB3 #B3288E #8EB328

tetradic

#288EB3 #9228B3 #B34D28 #49B328

square

#288EB3 #9228B3 #B34D28 #49B328

split-complementary

#288EB3 #B32849 #B39228

monochromatic

#123F4F #1D6681 #288EB3 #43AED5 #75C4E0

Accessibility & contrast

On white

3.74

#288EB3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.61

#288EB3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #288EB3

5.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##288EB3	#FFFFFF	#000000	##000000
##288EB3	1.00	3.74	5.61	5.61
#FFFFFF	3.74	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)

#7A8BB5

Deuteranopia (green-blind)

#687EB3

Tritanopia (blue-blind)

#00999A

Achromatopsia (no color)

#848484

Design tokens & code

CSS

--color: #288eb3;
/* rgb */ color: rgb(40, 142, 179);
/* oklch */ color: oklch(60.6% 0.105 227.4);

Tailwind

colors: {
  custom: {
    50: '#78afca',
    500: '#288eb3',
    950: '#000000',
  },
}

SCSS

$custom: #288eb3;
$custom-light: #78afca;
$custom-dark: #000000;

JSON

{
  "hex": "#288eb3",
  "rgb": {
    "r": 40,
    "g": 142,
    "b": 179
  },
  "hsl": {
    "h": 195.971,
    "s": 63.47,
    "l": 42.941
  },
  "oklch": {
    "l": 0.60642,
    "c": 0.10519,
    "h": 227.4
  },
  "luminance": 0.23052
}

Semantic roles & 50–950 ramp

primary

#288EB3

secondary

#C8876F

accent

#6D41E6

background

#F7FAFC

surface

#EEF4F8

border

#C9CED1

text

#0A1013

muted

#7C7F82

Preview Lab

Preview with #288EB3

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

Preview Lab → · Contrast checker → · Palette generator →