#4279BB#4279BB

#4279BB is a mid, moderate cyan. Relative luminance 0.184; OKLCH L 56.9% C 0.118 H 254.2°. Best body text is #000000 at 4.68:1 contrast (WCAG AA passes).

Color values

HEX	#4279BB
RGB	rgb(66, 121, 187)
HSL	hsl(213, 48%, 50%)
HSV	hsv(213, 65%, 73%)
CMYK	cmyk(64.7%, 35.3%, 0%, 26.7%)
CIE-LAB	lab(50.00, 2.92, -40.10)
CIE-LCH	lch(50.00, 40.21, 274.16°)
OKLab	oklab(56.93% -0.0322 -0.1137)
OKLCH	oklch(56.93% 0.118 254.2)
XYZ	xyz(18.0505, 18.4191, 49.6080)
Luminance	0.1842 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4279BB #BB8442

analogous

#42B6BB #4279BB #4742BB

triadic

#4279BB #BB4279 #79BB42

tetradic

#4279BB #BB42B6 #BB8442 #42BB47

square

#4279BB #BB42B6 #BB8442 #42BB47

split-complementary

#4279BB #BB4742 #B6BB42

monochromatic

#223E61 #325C8E #4279BB #6E99CC #9CB9DC

Accessibility & contrast

On white

4.48

#4279BB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.68

#4279BB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4279BB

4.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4279BB	#FFFFFF	#000000	##000000
##4279BB	1.00	4.48	4.68	4.68
#FFFFFF	4.48	1.00	21.00	21.00
#000000	4.68	21.00	1.00	1.00
##000000	4.68	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5C7DBE

Deuteranopia (green-blind)

#4B72BA

Tritanopia (blue-blind)

#008891

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #4279bb;
/* rgb */ color: rgb(66, 121, 187);
/* oklch */ color: oklch(56.9% 0.118 254.2);

Tailwind

colors: {
  custom: {
    50: '#829fd0',
    500: '#4279bb',
    950: '#000000',
  },
}

SCSS

$custom: #4279bb;
$custom-light: #829fd0;
$custom-dark: #000000;

JSON

{
  "hex": "#4279bb",
  "rgb": {
    "r": 66,
    "g": 121,
    "b": 187
  },
  "hsl": {
    "h": 212.727,
    "s": 47.826,
    "l": 49.608
  },
  "oklch": {
    "l": 0.5693,
    "c": 0.11818,
    "h": 254.2
  },
  "luminance": 0.18421
}

Semantic roles & 50–950 ramp

primary

#4279BB

secondary

#C8AF91

accent

#9A50D7

background

#F8F9FC

surface

#F0F2F9

border

#CBCCD2

text

#0B0E14

muted

#7C7E82

Preview Lab

Preview with #4279BB

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

Preview Lab → · Contrast checker → · Palette generator →