#2551A4#2551A4

#2551A4 is a mid, vivid blue. Relative luminance 0.090; OKLCH L 45.3% C 0.143 H 261.6°. Best body text is #FFFFFF at 7.52:1 contrast (WCAG AA passes).

Color values

HEX	#2551A4
RGB	rgb(37, 81, 164)
HSL	hsl(219, 63%, 39%)
HSV	hsv(219, 77%, 64%)
CMYK	cmyk(77.4%, 50.6%, 0%, 35.7%)
CIE-LAB	lab(35.90, 15.46, -49.19)
CIE-LCH	lch(35.90, 51.56, 287.45°)
OKLab	oklab(45.26% -0.0209 -0.1415)
OKLCH	oklch(45.26% 0.143 261.6)
XYZ	xyz(10.4038, 8.9573, 36.2954)
Luminance	0.0896 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2551A4 #A47825

analogous

#2590A4 #2551A4 #3925A4

triadic

#2551A4 #A42551 #51A425

tetradic

#2551A4 #A42590 #A47825 #25A439

square

#2551A4 #A42590 #A47825 #25A439

split-complementary

#2551A4 #A43925 #90A425

monochromatic

#0E2040 #1A3872 #2551A4 #356BD1 #6790DD

Accessibility & contrast

On white

7.52

#2551A4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.79

#2551A4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2551A4

7.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2551A4	#FFFFFF	#000000	##FFFFFF
##2551A4	1.00	7.52	2.79	7.52
#FFFFFF	7.52	1.00	21.00	1.00
#000000	2.79	21.00	1.00	21.00
##FFFFFF	7.52	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1F5BA7

Deuteranopia (green-blind)

#004FA2

Tritanopia (blue-blind)

#006572

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #2551a4;
/* rgb */ color: rgb(37, 81, 164);
/* oklch */ color: oklch(45.3% 0.143 261.6);

Tailwind

colors: {
  custom: {
    50: '#7381c0',
    500: '#2551a4',
    950: '#000000',
  },
}

SCSS

$custom: #2551a4;
$custom-light: #7381c0;
$custom-dark: #000000;

JSON

{
  "hex": "#2551a4",
  "rgb": {
    "r": 37,
    "g": 81,
    "b": 164
  },
  "hsl": {
    "h": 219.213,
    "s": 63.184,
    "l": 39.412
  },
  "oklch": {
    "l": 0.45261,
    "c": 0.143,
    "h": 261.6
  },
  "luminance": 0.08959
}

Semantic roles & 50–950 ramp

primary

#2551A4

secondary

#C2A162

accent

#AD42E6

background

#F7F7FB

surface

#EDEEF7

border

#C8C9D0

text

#090A12

muted

#7B7C81

Preview Lab

Preview with #2551A4

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

Preview Lab → · Contrast checker → · Palette generator →