#255DB0#255DB0

#255DB0 is a mid, vivid blue. Relative luminance 0.114; OKLCH L 48.8% C 0.145 H 258.5°. Best body text is #FFFFFF at 6.42:1 contrast (WCAG AA passes).

Color values

HEX	#255DB0
RGB	rgb(37, 93, 176)
HSL	hsl(216, 65%, 42%)
HSV	hsv(216, 79%, 69%)
CMYK	cmyk(79%, 47.2%, 0%, 31%)
CIE-LAB	lab(40.17, 12.22, -49.43)
CIE-LCH	lch(40.17, 50.92, 283.89°)
OKLab	oklab(48.8% -0.0288 -0.1419)
OKLCH	oklch(48.8% 0.145 258.5)
XYZ	xyz(12.5109, 11.3551, 42.5983)
Luminance	0.1136 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#255DB0 #B07825

analogous

#25A3B0 #255DB0 #3225B0

triadic

#255DB0 #B0255D #5DB025

tetradic

#255DB0 #B025A3 #B07825 #25B032

square

#255DB0 #B025A3 #B07825 #25B032

split-complementary

#255DB0 #B03225 #A3B025

monochromatic

#10284B #1A427D #255DB0 #3C7AD6 #6F9DE1

Accessibility & contrast

On white

6.42

#255DB0 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.27

#255DB0 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #255DB0

6.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##255DB0	#FFFFFF	#000000	##FFFFFF
##255DB0	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)

#3065B3

Deuteranopia (green-blind)

#0759AE

Tritanopia (blue-blind)

#00717E

Achromatopsia (no color)

#5F5F5F

Design tokens & code

CSS

--color: #255db0;
/* rgb */ color: rgb(37, 93, 176);
/* oklch */ color: oklch(48.8% 0.145 258.5);

Tailwind

colors: {
  custom: {
    50: '#758ac8',
    500: '#255db0',
    950: '#000000',
  },
}

SCSS

$custom: #255db0;
$custom-light: #758ac8;
$custom-dark: #000000;

JSON

{
  "hex": "#255db0",
  "rgb": {
    "r": 37,
    "g": 93,
    "b": 176
  },
  "hsl": {
    "h": 215.827,
    "s": 65.258,
    "l": 41.765
  },
  "oklch": {
    "l": 0.48797,
    "c": 0.14483,
    "h": 258.5
  },
  "luminance": 0.11357
}

Semantic roles & 50–950 ramp

primary

#255DB0

secondary

#C7A26A

accent

#A440E8

background

#F7F8FC

surface

#EEF0F8

border

#C9CBD1

text

#0A0B13

muted

#7C7C82

Preview Lab

Preview with #255DB0

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

Preview Lab → · Contrast checker → · Palette generator →