#4277CB#4277CB

#4277CB is a mid, vivid blue. Relative luminance 0.187; OKLCH L 57.4% C 0.142 H 259.3°. Best body text is #000000 at 4.73:1 contrast (WCAG AA passes).

Color values

HEX	#4277CB
RGB	rgb(66, 119, 203)
HSL	hsl(217, 57%, 53%)
HSV	hsv(217, 67%, 80%)
CMYK	cmyk(67.5%, 41.4%, 0%, 20.4%)
CIE-LAB	lab(50.29, 9.77, -48.81)
CIE-LCH	lch(50.29, 49.78, 281.31°)
OKLab	oklab(57.43% -0.0264 -0.1392)
OKLCH	oklch(57.43% 0.142 259.3)
XYZ	xyz(19.6192, 18.6617, 59.0565)
Luminance	0.1866 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4277CB #CB9642

analogous

#42BCCB #4277CB #5142CB

triadic

#4277CB #CB4277 #77CB42

tetradic

#4277CB #CB42BC #CB9642 #42CB51

square

#4277CB #CB42BC #CB9642 #42CB51

split-complementary

#4277CB #CB5142 #BCCB42

monochromatic

#204073 #2D5BA3 #4277CB #729AD8 #A2BCE5

Accessibility & contrast

On white

4.44

#4277CB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.73

#4277CB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4277CB

4.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4277CB	#FFFFFF	#000000	##000000
##4277CB	1.00	4.44	4.73	4.73
#FFFFFF	4.44	1.00	21.00	21.00
#000000	4.73	21.00	1.00	1.00
##000000	4.73	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#507FCE

Deuteranopia (green-blind)

#3A72C9

Tritanopia (blue-blind)

#008A97

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #4277cb;
/* rgb */ color: rgb(66, 119, 203);
/* oklch */ color: oklch(57.4% 0.142 259.3);

Tailwind

colors: {
  custom: {
    50: '#859ddb',
    500: '#4277cb',
    950: '#000000',
  },
}

SCSS

$custom: #4277cb;
$custom-light: #859ddb;
$custom-dark: #000000;

JSON

{
  "hex": "#4277cb",
  "rgb": {
    "r": 66,
    "g": 119,
    "b": 203
  },
  "hsl": {
    "h": 216.788,
    "s": 56.846,
    "l": 52.745
  },
  "oklch": {
    "l": 0.57434,
    "c": 0.14172,
    "h": 259.3
  },
  "luminance": 0.18664
}

Semantic roles & 50–950 ramp

primary

#4277CB

secondary

#D2BB97

accent

#A548E0

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #4277CB

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

Preview Lab → · Contrast checker → · Palette generator →