#4281BB#4281BB

#4281BB is a mid, moderate cyan. Relative luminance 0.204; OKLCH L 58.8% C 0.111 H 248.5°. Best body text is #000000 at 5.09:1 contrast (WCAG AA passes).

Color values

HEX	#4281BB
RGB	rgb(66, 129, 187)
HSL	hsl(209, 48%, 50%)
HSV	hsv(209, 65%, 73%)
CMYK	cmyk(64.7%, 31%, 0%, 26.7%)
CIE-LAB	lab(52.34, -1.88, -36.42)
CIE-LCH	lch(52.34, 36.47, 267.05°)
OKLab	oklab(58.76% -0.0406 -0.1029)
OKLCH	oklch(58.76% 0.111 248.5)
XYZ	xyz(19.0633, 20.4447, 49.9457)
Luminance	0.2045 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4281BB #BB7C42

analogous

#42BBB8 #4281BB #4245BB

triadic

#4281BB #BB4281 #81BB42

tetradic

#4281BB #B842BB #BB7C42 #45BB42

square

#4281BB #B842BB #BB7C42 #45BB42

split-complementary

#4281BB #BB4245 #BBB842

monochromatic

#224361 #32628E #4281BB #6E9FCC #9CBDDC

Accessibility & contrast

On white

4.13

#4281BB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.09

#4281BB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4281BB

5.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4281BB	#FFFFFF	#000000	##000000
##4281BB	1.00	4.13	5.09	5.09
#FFFFFF	4.13	1.00	21.00	21.00
#000000	5.09	21.00	1.00	1.00
##000000	5.09	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6883BE

Deuteranopia (green-blind)

#5778BA

Tritanopia (blue-blind)

#008F96

Achromatopsia (no color)

#7D7D7D

Design tokens & code

CSS

--color: #4281bb;
/* rgb */ color: rgb(66, 129, 187);
/* oklch */ color: oklch(58.8% 0.111 248.5);

Tailwind

colors: {
  custom: {
    50: '#82a5cf',
    500: '#4281bb',
    950: '#000000',
  },
}

SCSS

$custom: #4281bb;
$custom-light: #82a5cf;
$custom-dark: #000000;

JSON

{
  "hex": "#4281bb",
  "rgb": {
    "r": 66,
    "g": 129,
    "b": 187
  },
  "hsl": {
    "h": 208.76,
    "s": 47.826,
    "l": 49.608
  },
  "oklch": {
    "l": 0.58761,
    "c": 0.11061,
    "h": 248.5
  },
  "luminance": 0.20447
}

Semantic roles & 50–950 ramp

primary

#4281BB

secondary

#C8AB91

accent

#9150D7

background

#F8FAFC

surface

#F0F4F9

border

#CBCED2

text

#0B0F14

muted

#7C7F82

Preview Lab

Preview with #4281BB

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

Preview Lab → · Contrast checker → · Palette generator →