#2451B4#2451B4

#2451B4 is a mid, vivid blue. Relative luminance 0.096; OKLCH L 46.5% C 0.165 H 263.1°. Best body text is #FFFFFF at 7.21:1 contrast (WCAG AA passes).

Color values

HEX	#2451B4
RGB	rgb(36, 81, 180)
HSL	hsl(221, 67%, 42%)
HSV	hsv(221, 80%, 71%)
CMYK	cmyk(80%, 55%, 0%, 29.4%)
CIE-LAB	lab(37.03, 21.60, -56.87)
CIE-LCH	lch(37.03, 60.83, 290.80°)
OKLab	oklab(46.48% -0.0198 -0.1641)
OKLCH	oklch(46.48% 0.165 263.1)
XYZ	xyz(11.9053, 9.5538, 44.3878)
Luminance	0.0955 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2451B4 #B48724

analogous

#2499B4 #2451B4 #3F24B4

triadic

#2451B4 #B42451 #51B424

tetradic

#2451B4 #B42499 #B48724 #24B43F

square

#2451B4 #B42499 #B48724 #24B43F

split-complementary

#2451B4 #B43F24 #99B424

monochromatic

#10234E #1A3A81 #2451B4 #3D6ED8 #7094E2

Accessibility & contrast

On white

7.21

#2451B4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.91

#2451B4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2451B4

7.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2451B4	#FFFFFF	#000000	##FFFFFF
##2451B4	1.00	7.21	2.91	7.21
#FFFFFF	7.21	1.00	21.00	1.00
#000000	2.91	21.00	1.00	21.00
##FFFFFF	7.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005EB7

Deuteranopia (green-blind)

#0051B2

Tritanopia (blue-blind)

#00697A

Achromatopsia (no color)

#575757

Design tokens & code

CSS

--color: #2451b4;
/* rgb */ color: rgb(36, 81, 180);
/* oklch */ color: oklch(46.5% 0.165 263.1);

Tailwind

colors: {
  custom: {
    50: '#7681cb',
    500: '#2451b4',
    950: '#000000',
  },
}

SCSS

$custom: #2451b4;
$custom-light: #7681cb;
$custom-dark: #000000;

JSON

{
  "hex": "#2451b4",
  "rgb": {
    "r": 36,
    "g": 81,
    "b": 180
  },
  "hsl": {
    "h": 221.25,
    "s": 66.667,
    "l": 42.353
  },
  "oklch": {
    "l": 0.46477,
    "c": 0.16527,
    "h": 263.1
  },
  "luminance": 0.09555
}

Semantic roles & 50–950 ramp

primary

#2451B4

secondary

#C9AC6B

accent

#B43EEA

background

#F7F7FC

surface

#EEEEF9

border

#C9C9D2

text

#0A0A13

muted

#7C7C82

Preview Lab

Preview with #2451B4

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

Preview Lab → · Contrast checker → · Palette generator →