#288FB5#288FB5

#288FB5 is a mid, moderate cyan. Relative luminance 0.234; OKLCH L 61.0% C 0.106 H 227.8°. Best body text is #000000 at 5.69:1 contrast (WCAG AA passes).

Color values

HEX	#288FB5
RGB	rgb(40, 143, 181)
HSL	hsl(196, 64%, 43%)
HSV	hsv(196, 78%, 71%)
CMYK	cmyk(77.9%, 21%, 0%, 29%)
CIE-LAB	lab(55.51, -15.71, -28.10)
CIE-LCH	lch(55.51, 32.19, 240.78°)
OKLab	oklab(60.98% -0.0715 -0.0789)
OKLCH	oklch(60.98% 0.106 227.8)
XYZ	xyz(19.0346, 23.4299, 47.2263)
Luminance	0.2343 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#288FB5 #B54E28

analogous

#28B594 #288FB5 #2848B5

triadic

#288FB5 #B5288F #8FB528

tetradic

#288FB5 #9428B5 #B54E28 #48B528

square

#288FB5 #9428B5 #B54E28 #48B528

split-complementary

#288FB5 #B52848 #B59428

monochromatic

#124051 #1D6783 #288FB5 #44AFD6 #77C4E1

Accessibility & contrast

On white

3.69

#288FB5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.69

#288FB5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #288FB5

5.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##288FB5	#FFFFFF	#000000	##000000
##288FB5	1.00	3.69	5.69	5.69
#FFFFFF	3.69	1.00	21.00	21.00
#000000	5.69	21.00	1.00	1.00
##000000	5.69	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7B8CB7

Deuteranopia (green-blind)

#687FB5

Tritanopia (blue-blind)

#009A9C

Achromatopsia (no color)

#858585

Design tokens & code

CSS

--color: #288fb5;
/* rgb */ color: rgb(40, 143, 181);
/* oklch */ color: oklch(61.0% 0.106 227.8);

Tailwind

colors: {
  custom: {
    50: '#78afcb',
    500: '#288fb5',
    950: '#000000',
  },
}

SCSS

$custom: #288fb5;
$custom-light: #78afcb;
$custom-dark: #000000;

JSON

{
  "hex": "#288fb5",
  "rgb": {
    "r": 40,
    "g": 143,
    "b": 181
  },
  "hsl": {
    "h": 196.17,
    "s": 63.801,
    "l": 43.333
  },
  "oklch": {
    "l": 0.60981,
    "c": 0.10647,
    "h": 227.8
  },
  "luminance": 0.23432
}

Semantic roles & 50–950 ramp

primary

#288FB5

secondary

#C88870

accent

#6E41E7

background

#F8FAFC

surface

#EFF4F8

border

#CACED1

text

#0A1013

muted

#7C7F82

Preview Lab

Preview with #288FB5

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

Preview Lab → · Contrast checker → · Palette generator →