#255EB3#255EB3

#255EB3 is a mid, vivid blue. Relative luminance 0.117; OKLCH L 49.2% C 0.148 H 258.6°. Best body text is #FFFFFF at 6.31:1 contrast (WCAG AA passes).

Color values

HEX	#255EB3
RGB	rgb(37, 94, 179)
HSL	hsl(216, 66%, 42%)
HSV	hsv(216, 79%, 70%)
CMYK	cmyk(79.3%, 47.5%, 0%, 29.8%)
CIE-LAB	lab(40.66, 12.74, -50.41)
CIE-LCH	lch(40.66, 52.00, 284.18°)
OKLab	oklab(49.23% -0.0291 -0.1448)
OKLCH	oklch(49.23% 0.148 258.6)
XYZ	xyz(12.8994, 11.6519, 44.2083)
Luminance	0.1165 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#255EB3 #B37A25

analogous

#25A5B3 #255EB3 #3325B3

triadic

#255EB3 #B3255E #5EB325

tetradic

#255EB3 #B325A5 #B37A25 #25B333

square

#255EB3 #B325A5 #B37A25 #25B333

split-complementary

#255EB3 #B33325 #A5B325

monochromatic

#10294E #1B4380 #255EB3 #3E7CD7 #719EE2

Accessibility & contrast

On white

6.31

#255EB3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.33

#255EB3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #255EB3

6.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##255EB3	#FFFFFF	#000000	##FFFFFF
##255EB3	1.00	6.31	3.33	6.31
#FFFFFF	6.31	1.00	21.00	1.00
#000000	3.33	21.00	1.00	21.00
##FFFFFF	6.31	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2F67B6

Deuteranopia (green-blind)

#015AB1

Tritanopia (blue-blind)

#007280

Achromatopsia (no color)

#606060

Design tokens & code

CSS

--color: #255eb3;
/* rgb */ color: rgb(37, 94, 179);
/* oklch */ color: oklch(49.2% 0.148 258.6);

Tailwind

colors: {
  custom: {
    50: '#768bca',
    500: '#255eb3',
    950: '#000000',
  },
}

SCSS

$custom: #255eb3;
$custom-light: #768bca;
$custom-dark: #000000;

JSON

{
  "hex": "#255eb3",
  "rgb": {
    "r": 37,
    "g": 94,
    "b": 179
  },
  "hsl": {
    "h": 215.915,
    "s": 65.741,
    "l": 42.353
  },
  "oklch": {
    "l": 0.49234,
    "c": 0.1477,
    "h": 258.6
  },
  "luminance": 0.11653
}

Semantic roles & 50–950 ramp

primary

#255EB3

secondary

#C8A36B

accent

#A53FE9

background

#F7F8FC

surface

#EEF0F8

border

#C9CBD1

text

#0A0B13

muted

#7C7C82

Preview Lab

Preview with #255EB3

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

Preview Lab → · Contrast checker → · Palette generator →