#255DB1#255DB1

#255DB1 is a mid, vivid blue. Relative luminance 0.114; OKLCH L 48.9% C 0.146 H 258.7°. Best body text is #FFFFFF at 6.40:1 contrast (WCAG AA passes).

Color values

HEX	#255DB1
RGB	rgb(37, 93, 177)
HSL	hsl(216, 65%, 42%)
HSV	hsv(216, 79%, 69%)
CMYK	cmyk(79.1%, 47.5%, 0%, 30.6%)
CIE-LAB	lab(40.24, 12.61, -49.91)
CIE-LCH	lch(40.24, 51.48, 284.18°)
OKLab	oklab(48.87% -0.0286 -0.1433)
OKLCH	oklch(48.87% 0.146 258.7)
XYZ	xyz(12.6102, 11.3949, 43.1213)
Luminance	0.1140 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#255DB1 #B17925

analogous

#25A3B1 #255DB1 #3325B1

triadic

#255DB1 #B1255D #5DB125

tetradic

#255DB1 #B125A3 #B17925 #25B133

square

#255DB1 #B125A3 #B17925 #25B133

split-complementary

#255DB1 #B13325 #A3B125

monochromatic

#10284C #1A427E #255DB1 #3D7AD6 #6F9DE1

Accessibility & contrast

On white

6.40

#255DB1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.28

#255DB1 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #255DB1

6.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##255DB1	#FFFFFF	#000000	##FFFFFF
##255DB1	1.00	6.40	3.28	6.40
#FFFFFF	6.40	1.00	21.00	1.00
#000000	3.28	21.00	1.00	21.00
##FFFFFF	6.40	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2F66B4

Deuteranopia (green-blind)

#0359AF

Tritanopia (blue-blind)

#00717E

Achromatopsia (no color)

#5F5F5F

Design tokens & code

CSS

--color: #255db1;
/* rgb */ color: rgb(37, 93, 177);
/* oklch */ color: oklch(48.9% 0.146 258.7);

Tailwind

colors: {
  custom: {
    50: '#758ac9',
    500: '#255db1',
    950: '#000000',
  },
}

SCSS

$custom: #255db1;
$custom-light: #758ac9;
$custom-dark: #000000;

JSON

{
  "hex": "#255db1",
  "rgb": {
    "r": 37,
    "g": 93,
    "b": 177
  },
  "hsl": {
    "h": 216,
    "s": 65.421,
    "l": 41.961
  },
  "oklch": {
    "l": 0.48869,
    "c": 0.14618,
    "h": 258.7
  },
  "luminance": 0.11396
}

Semantic roles & 50–950 ramp

primary

#255DB1

secondary

#C8A26A

accent

#A53FE8

background

#F7F8FC

surface

#EEF0F8

border

#C9CBD1

text

#0A0B13

muted

#7C7C82

Preview Lab

Preview with #255DB1

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

Preview Lab → · Contrast checker → · Palette generator →