#255DAF#255DAF

#255DAF is a mid, vivid blue. Relative luminance 0.113; OKLCH L 48.7% C 0.143 H 258.3°. Best body text is #FFFFFF at 6.44:1 contrast (WCAG AA passes).

Color values

HEX	#255DAF
RGB	rgb(37, 93, 175)
HSL	hsl(216, 65%, 42%)
HSV	hsv(216, 79%, 69%)
CMYK	cmyk(78.9%, 46.9%, 0%, 31.4%)
CIE-LAB	lab(40.11, 11.83, -48.94)
CIE-LCH	lch(40.11, 50.35, 283.59°)
OKLab	oklab(48.73% -0.029 -0.1405)
OKLCH	oklch(48.73% 0.143 258.3)
XYZ	xyz(12.4123, 11.3157, 42.0791)
Luminance	0.1132 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#255DAF #AF7725

analogous

#25A2AF #255DAF #3225AF

triadic

#255DAF #AF255D #5DAF25

tetradic

#255DAF #AF25A2 #AF7725 #25AF32

square

#255DAF #AF25A2 #AF7725 #25AF32

split-complementary

#255DAF #AF3225 #A2AF25

monochromatic

#10274A #1A427C #255DAF #3C7AD6 #6E9CE0

Accessibility & contrast

On white

6.44

#255DAF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.26

#255DAF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #255DAF

6.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##255DAF	#FFFFFF	#000000	##FFFFFF
##255DAF	1.00	6.44	3.26	6.44
#FFFFFF	6.44	1.00	21.00	1.00
#000000	3.26	21.00	1.00	21.00
##FFFFFF	6.44	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3165B2

Deuteranopia (green-blind)

#0B59AD

Tritanopia (blue-blind)

#00717D

Achromatopsia (no color)

#5E5E5E

Design tokens & code

CSS

--color: #255daf;
/* rgb */ color: rgb(37, 93, 175);
/* oklch */ color: oklch(48.7% 0.143 258.3);

Tailwind

colors: {
  custom: {
    50: '#758ac7',
    500: '#255daf',
    950: '#000000',
  },
}

SCSS

$custom: #255daf;
$custom-light: #758ac7;
$custom-dark: #000000;

JSON

{
  "hex": "#255daf",
  "rgb": {
    "r": 37,
    "g": 93,
    "b": 175
  },
  "hsl": {
    "h": 215.652,
    "s": 65.094,
    "l": 41.569
  },
  "oklch": {
    "l": 0.48726,
    "c": 0.14346,
    "h": 258.3
  },
  "luminance": 0.11317
}

Semantic roles & 50–950 ramp

primary

#255DAF

secondary

#C7A169

accent

#A440E8

background

#F7F8FC

surface

#EEF0F8

border

#C9CBD1

text

#0A0B13

muted

#7C7C82

Preview Lab

Preview with #255DAF

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

Preview Lab → · Contrast checker → · Palette generator →