#2451B0#2451B0

#2451B0 is a mid, vivid blue. Relative luminance 0.094; OKLCH L 46.2% C 0.160 H 262.7°. Best body text is #FFFFFF at 7.29:1 contrast (WCAG AA passes).

Color values

HEX	#2451B0
RGB	rgb(36, 81, 176)
HSL	hsl(221, 66%, 42%)
HSV	hsv(221, 80%, 69%)
CMYK	cmyk(79.5%, 54%, 0%, 31%)
CIE-LAB	lab(36.73, 20.04, -54.99)
CIE-LCH	lch(36.73, 58.53, 290.02°)
OKLab	oklab(46.16% -0.0202 -0.1585)
OKLCH	oklch(46.16% 0.16 262.7)
XYZ	xyz(11.5036, 9.3932, 42.2727)
Luminance	0.0940 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2451B0 #B08324

analogous

#2497B0 #2451B0 #3D24B0

triadic

#2451B0 #B02451 #51B024

tetradic

#2451B0 #B02497 #B08324 #24B03D

square

#2451B0 #B02497 #B08324 #24B03D

split-complementary

#2451B0 #B03D24 #97B024

monochromatic

#0F224A #1A3A7D #2451B0 #3A6DD7 #6D92E1

Accessibility & contrast

On white

7.29

#2451B0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.88

#2451B0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2451B0

7.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2451B0	#FFFFFF	#000000	##FFFFFF
##2451B0	1.00	7.29	2.88	7.29
#FFFFFF	7.29	1.00	21.00	1.00
#000000	2.88	21.00	1.00	21.00
##FFFFFF	7.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#015DB3

Deuteranopia (green-blind)

#0050AE

Tritanopia (blue-blind)

#006878

Achromatopsia (no color)

#565656

Design tokens & code

CSS

--color: #2451b0;
/* rgb */ color: rgb(36, 81, 176);
/* oklch */ color: oklch(46.2% 0.160 262.7);

Tailwind

colors: {
  custom: {
    50: '#7581c8',
    500: '#2451b0',
    950: '#000000',
  },
}

SCSS

$custom: #2451b0;
$custom-light: #7581c8;
$custom-dark: #000000;

JSON

{
  "hex": "#2451b0",
  "rgb": {
    "r": 36,
    "g": 81,
    "b": 176
  },
  "hsl": {
    "h": 220.714,
    "s": 66.038,
    "l": 41.569
  },
  "oklch": {
    "l": 0.46156,
    "c": 0.15982,
    "h": 262.7
  },
  "luminance": 0.09395
}

Semantic roles & 50–950 ramp

primary

#2451B0

secondary

#C8A968

accent

#B23FE9

background

#F7F7FC

surface

#EEEEF8

border

#C9C9D1

text

#0A0A13

muted

#7C7C82

Preview Lab

Preview with #2451B0

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

Preview Lab → · Contrast checker → · Palette generator →