#2551AD#2551AD

#2551AD is a mid, vivid blue. Relative luminance 0.093; OKLCH L 46.0% C 0.155 H 262.7°. Best body text is #FFFFFF at 7.35:1 contrast (WCAG AA passes).

Color values

HEX	#2551AD
RGB	rgb(37, 81, 173)
HSL	hsl(221, 65%, 41%)
HSV	hsv(221, 79%, 68%)
CMYK	cmyk(78.6%, 53.2%, 0%, 32.2%)
CIE-LAB	lab(36.54, 18.98, -53.51)
CIE-LCH	lch(36.54, 56.78, 289.53°)
OKLab	oklab(45.96% -0.0198 -0.1542)
OKLCH	oklch(45.96% 0.155 262.7)
XYZ	xyz(11.2455, 9.2940, 40.7283)
Luminance	0.0930 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2551AD #AD8125

analogous

#2595AD #2551AD #3D25AD

triadic

#2551AD #AD2551 #51AD25

tetradic

#2551AD #AD2595 #AD8125 #25AD3D

square

#2551AD #AD2595 #AD8125 #25AD3D

split-complementary

#2551AD #AD3D25 #95AD25

monochromatic

#0F2248 #1A397B #2551AD #3A6CD5 #6D92E0

Accessibility & contrast

On white

7.35

#2551AD on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.86

#2551AD on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2551AD

7.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2551AD	#FFFFFF	#000000	##FFFFFF
##2551AD	1.00	7.35	2.86	7.35
#FFFFFF	7.35	1.00	21.00	1.00
#000000	2.86	21.00	1.00	21.00
##FFFFFF	7.35	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0C5DB0

Deuteranopia (green-blind)

#0050AB

Tritanopia (blue-blind)

#006777

Achromatopsia (no color)

#565656

Design tokens & code

CSS

--color: #2551ad;
/* rgb */ color: rgb(37, 81, 173);
/* oklch */ color: oklch(46.0% 0.155 262.7);

Tailwind

colors: {
  custom: {
    50: '#7581c6',
    500: '#2551ad',
    950: '#000000',
  },
}

SCSS

$custom: #2551ad;
$custom-light: #7581c6;
$custom-dark: #000000;

JSON

{
  "hex": "#2551ad",
  "rgb": {
    "r": 37,
    "g": 81,
    "b": 173
  },
  "hsl": {
    "h": 220.588,
    "s": 64.762,
    "l": 41.176
  },
  "oklch": {
    "l": 0.45955,
    "c": 0.15545,
    "h": 262.7
  },
  "luminance": 0.09295
}

Semantic roles & 50–950 ramp

primary

#2551AD

secondary

#C6A868

accent

#B140E8

background

#F7F7FC

surface

#EEEEF8

border

#C9C9D1

text

#0A0A13

muted

#7C7C82

Preview Lab

Preview with #2551AD

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

Preview Lab → · Contrast checker → · Palette generator →