#4255BB#4255BB

#4255BB is a mid, vivid blue. Relative luminance 0.112; OKLCH L 49.2% C 0.161 H 271.3°. Best body text is #FFFFFF at 6.46:1 contrast (WCAG AA passes).

Color values

HEX	#4255BB
RGB	rgb(66, 85, 187)
HSL	hsl(231, 48%, 50%)
HSV	hsv(231, 65%, 73%)
CMYK	cmyk(64.7%, 54.5%, 0%, 26.7%)
CIE-LAB	lab(39.98, 25.62, -56.12)
CIE-LCH	lch(39.98, 61.69, 294.53°)
OKLab	oklab(49.24% 0.0037 -0.1612)
OKLCH	oklch(49.24% 0.161 271.3)
XYZ	xyz(14.4619, 11.2418, 48.4118)
Luminance	0.1124 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4255BB #BBA842

analogous

#4291BB #4255BB #6C42BB

triadic

#4255BB #BB4255 #55BB42

tetradic

#4255BB #BB4291 #BBA842 #42BB6C

square

#4255BB #BB4291 #BBA842 #42BB6C

split-complementary

#4255BB #BB6C42 #91BB42

monochromatic

#222C61 #32408E #4255BB #6E7DCC #9CA6DC

Accessibility & contrast

On white

6.46

#4255BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.25

#4255BB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4255BB

6.46:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4255BB	#FFFFFF	#000000	##FFFFFF
##4255BB	1.00	6.46	3.25	6.46
#FFFFFF	6.46	1.00	21.00	1.00
#000000	3.25	21.00	1.00	21.00
##FFFFFF	6.46	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0764BF

Deuteranopia (green-blind)

#0059B9

Tritanopia (blue-blind)

#006D80

Achromatopsia (no color)

#5E5E5E

Design tokens & code

CSS

--color: #4255bb;
/* rgb */ color: rgb(66, 85, 187);
/* oklch */ color: oklch(49.2% 0.161 271.3);

Tailwind

colors: {
  custom: {
    50: '#8384d0',
    500: '#4255bb',
    950: '#000000',
  },
}

SCSS

$custom: #4255bb;
$custom-light: #8384d0;
$custom-dark: #000000;

JSON

{
  "hex": "#4255bb",
  "rgb": {
    "r": 66,
    "g": 85,
    "b": 187
  },
  "hsl": {
    "h": 230.579,
    "s": 47.826,
    "l": 49.608
  },
  "oklch": {
    "l": 0.49241,
    "c": 0.16127,
    "h": 271.3
  },
  "luminance": 0.11243
}

Semantic roles & 50–950 ramp

primary

#4255BB

secondary

#C8BF91

accent

#C250D7

background

#F8F8FC

surface

#F0EFF9

border

#CBCAD2

text

#0C0A14

muted

#7D7C82

Preview Lab

Preview with #4255BB

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

Preview Lab → · Contrast checker → · Palette generator →