#255CB4#255CB4

#255CB4 is a mid, vivid blue. Relative luminance 0.113; OKLCH L 48.9% C 0.151 H 259.6°. Best body text is #FFFFFF at 6.42:1 contrast (WCAG AA passes).

Color values

HEX	#255CB4
RGB	rgb(37, 92, 180)
HSL	hsl(217, 66%, 43%)
HSV	hsv(217, 79%, 71%)
CMYK	cmyk(79.4%, 48.9%, 0%, 29.4%)
CIE-LAB	lab(40.15, 14.43, -51.82)
CIE-LCH	lch(40.15, 53.79, 285.56°)
OKLab	oklab(48.86% -0.0274 -0.149)
OKLCH	oklch(48.86% 0.151 259.6)
XYZ	xyz(12.8253, 11.3414, 44.6843)
Luminance	0.1134 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#255CB4 #B47D25

analogous

#25A4B4 #255CB4 #3525B4

triadic

#255CB4 #B4255C #5CB425

tetradic

#255CB4 #B425A4 #B47D25 #25B435

square

#255CB4 #B425A4 #B47D25 #25B435

split-complementary

#255CB4 #B43525 #A4B425

monochromatic

#10284E #1B4281 #255CB4 #3F79D7 #719DE2

Accessibility & contrast

On white

6.42

#255CB4 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.27

#255CB4 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #255CB4

6.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##255CB4	#FFFFFF	#000000	##FFFFFF
##255CB4	1.00	6.42	3.27	6.42
#FFFFFF	6.42	1.00	21.00	1.00
#000000	3.27	21.00	1.00	21.00
##FFFFFF	6.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2966B7

Deuteranopia (green-blind)

#0059B2

Tritanopia (blue-blind)

#00717F

Achromatopsia (no color)

#5F5F5F

Design tokens & code

CSS

--color: #255cb4;
/* rgb */ color: rgb(37, 92, 180);
/* oklch */ color: oklch(48.9% 0.151 259.6);

Tailwind

colors: {
  custom: {
    50: '#7689cb',
    500: '#255cb4',
    950: '#000000',
  },
}

SCSS

$custom: #255cb4;
$custom-light: #7689cb;
$custom-dark: #000000;

JSON

{
  "hex": "#255cb4",
  "rgb": {
    "r": 37,
    "g": 92,
    "b": 180
  },
  "hsl": {
    "h": 216.923,
    "s": 65.899,
    "l": 42.549
  },
  "oklch": {
    "l": 0.48865,
    "c": 0.15147,
    "h": 259.6
  },
  "luminance": 0.11343
}

Semantic roles & 50–950 ramp

primary

#255CB4

secondary

#C9A56C

accent

#A83FE9

background

#F7F8FC

surface

#EEF0F9

border

#C9CBD2

text

#0A0B13

muted

#7C7C82

Preview Lab

Preview with #255CB4

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

Preview Lab → · Contrast checker → · Palette generator →