#255EB1#255EB1

#255EB1 is a mid, vivid blue. Relative luminance 0.116; OKLCH L 49.1% C 0.145 H 258.3°. Best body text is #FFFFFF at 6.34:1 contrast (WCAG AA passes).

Color values

HEX	#255EB1
RGB	rgb(37, 94, 177)
HSL	hsl(216, 65%, 42%)
HSV	hsv(216, 79%, 69%)
CMYK	cmyk(79.1%, 46.9%, 0%, 30.6%)
CIE-LAB	lab(40.53, 11.96, -49.45)
CIE-LCH	lch(40.53, 50.87, 283.60°)
OKLab	oklab(49.09% -0.0295 -0.142)
OKLCH	oklch(49.09% 0.145 258.3)
XYZ	xyz(12.6986, 11.5715, 43.1507)
Luminance	0.1157 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#255EB1 #B17825

analogous

#25A4B1 #255EB1 #3225B1

triadic

#255EB1 #B1255E #5EB125

tetradic

#255EB1 #B125A4 #B17825 #25B132

square

#255EB1 #B125A4 #B17825 #25B132

split-complementary

#255EB1 #B13225 #A4B125

monochromatic

#10284C #1A437E #255EB1 #3D7BD6 #6F9EE1

Accessibility & contrast

On white

6.34

#255EB1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.31

#255EB1 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #255EB1

6.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##255EB1	#FFFFFF	#000000	##FFFFFF
##255EB1	1.00	6.34	3.31	6.34
#FFFFFF	6.34	1.00	21.00	1.00
#000000	3.31	21.00	1.00	21.00
##FFFFFF	6.34	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3166B4

Deuteranopia (green-blind)

#0A5AAF

Tritanopia (blue-blind)

#00727F

Achromatopsia (no color)

#606060

Design tokens & code

CSS

--color: #255eb1;
/* rgb */ color: rgb(37, 94, 177);
/* oklch */ color: oklch(49.1% 0.145 258.3);

Tailwind

colors: {
  custom: {
    50: '#758bc9',
    500: '#255eb1',
    950: '#000000',
  },
}

SCSS

$custom: #255eb1;
$custom-light: #758bc9;
$custom-dark: #000000;

JSON

{
  "hex": "#255eb1",
  "rgb": {
    "r": 37,
    "g": 94,
    "b": 177
  },
  "hsl": {
    "h": 215.571,
    "s": 65.421,
    "l": 41.961
  },
  "oklch": {
    "l": 0.49091,
    "c": 0.14498,
    "h": 258.3
  },
  "luminance": 0.11573
}

Semantic roles & 50–950 ramp

primary

#255EB1

secondary

#C8A26A

accent

#A43FE8

background

#F7F8FC

surface

#EEF0F8

border

#C9CBD1

text

#0A0B13

muted

#7C7C82

Preview Lab

Preview with #255EB1

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

Preview Lab → · Contrast checker → · Palette generator →