#255BB0#255BB0

#255BB0 is a mid, vivid blue. Relative luminance 0.110; OKLCH L 48.4% C 0.147 H 259.4°. Best body text is #FFFFFF at 6.56:1 contrast (WCAG AA passes).

Color values

HEX	#255BB0
RGB	rgb(37, 91, 176)
HSL	hsl(217, 65%, 42%)
HSV	hsv(217, 79%, 69%)
CMYK	cmyk(79%, 48.3%, 0%, 31%)
CIE-LAB	lab(39.59, 13.53, -50.36)
CIE-LCH	lch(39.59, 52.14, 285.04°)
OKLab	oklab(48.35% -0.0272 -0.1447)
OKLCH	oklch(48.35% 0.147 259.4)
XYZ	xyz(12.3376, 11.0086, 42.5405)
Luminance	0.1101 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#255BB0 #B07A25

analogous

#25A1B0 #255BB0 #3525B0

triadic

#255BB0 #B0255B #5BB025

tetradic

#255BB0 #B025A1 #B07A25 #25B035

square

#255BB0 #B025A1 #B07A25 #25B035

split-complementary

#255BB0 #B03525 #A1B025

monochromatic

#10274B #1A417D #255BB0 #3C78D6 #6F9BE1

Accessibility & contrast

On white

6.56

#255BB0 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.20

#255BB0 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #255BB0

6.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##255BB0	#FFFFFF	#000000	##FFFFFF
##255BB0	1.00	6.56	3.20	6.56
#FFFFFF	6.56	1.00	21.00	1.00
#000000	3.20	21.00	1.00	21.00
##FFFFFF	6.56	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2B64B3

Deuteranopia (green-blind)

#0057AE

Tritanopia (blue-blind)

#006F7D

Achromatopsia (no color)

#5D5D5D

Design tokens & code

CSS

--color: #255bb0;
/* rgb */ color: rgb(37, 91, 176);
/* oklch */ color: oklch(48.4% 0.147 259.4);

Tailwind

colors: {
  custom: {
    50: '#7588c8',
    500: '#255bb0',
    950: '#000000',
  },
}

SCSS

$custom: #255bb0;
$custom-light: #7588c8;
$custom-dark: #000000;

JSON

{
  "hex": "#255bb0",
  "rgb": {
    "r": 37,
    "g": 91,
    "b": 176
  },
  "hsl": {
    "h": 216.691,
    "s": 65.258,
    "l": 41.765
  },
  "oklch": {
    "l": 0.48353,
    "c": 0.14723,
    "h": 259.4
  },
  "luminance": 0.1101
}

Semantic roles & 50–950 ramp

primary

#255BB0

secondary

#C7A36A

accent

#A740E8

background

#F7F8FC

surface

#EEEFF8

border

#C9CAD1

text

#0A0B13

muted

#7C7C82

Preview Lab

Preview with #255BB0

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

Preview Lab → · Contrast checker → · Palette generator →