#2551BA#2551BA

#2551BA is a mid, vivid blue. Relative luminance 0.098; OKLCH L 47.0% C 0.173 H 263.8°. Best body text is #FFFFFF at 7.08:1 contrast (WCAG AA passes).

Color values

HEX	#2551BA
RGB	rgb(37, 81, 186)
HSL	hsl(222, 67%, 44%)
HSV	hsv(222, 80%, 73%)
CMYK	cmyk(80.1%, 56.5%, 0%, 27.1%)
CIE-LAB	lab(37.52, 24.02, -59.60)
CIE-LCH	lch(37.52, 64.25, 291.95°)
OKLab	oklab(47% -0.0187 -0.1721)
OKLCH	oklch(47% 0.173 263.8)
XYZ	xyz(12.5651, 9.8219, 47.6784)
Luminance	0.0982 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2551BA #BA8E25

analogous

#259BBA #2551BA #4325BA

triadic

#2551BA #BA2551 #51BA25

tetradic

#2551BA #BA259B #BA8E25 #25BA43

square

#2551BA #BA259B #BA8E25 #25BA43

split-complementary

#2551BA #BA4325 #9BBA25

monochromatic

#112554 #1B3B87 #2551BA #436FDA #7696E4

Accessibility & contrast

On white

7.08

#2551BA on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.96

#2551BA on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2551BA

7.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2551BA	#FFFFFF	#000000	##FFFFFF
##2551BA	1.00	7.08	2.96	7.08
#FFFFFF	7.08	1.00	21.00	1.00
#000000	2.96	21.00	1.00	21.00
##FFFFFF	7.08	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005FBE

Deuteranopia (green-blind)

#0052B8

Tritanopia (blue-blind)

#006B7D

Achromatopsia (no color)

#585858

Design tokens & code

CSS

--color: #2551ba;
/* rgb */ color: rgb(37, 81, 186);
/* oklch */ color: oklch(47.0% 0.173 263.8);

Tailwind

colors: {
  custom: {
    50: '#7881d0',
    500: '#2551ba',
    950: '#000000',
  },
}

SCSS

$custom: #2551ba;
$custom-light: #7881d0;
$custom-dark: #000000;

JSON

{
  "hex": "#2551ba",
  "rgb": {
    "r": 37,
    "g": 81,
    "b": 186
  },
  "hsl": {
    "h": 222.282,
    "s": 66.816,
    "l": 43.725
  },
  "oklch": {
    "l": 0.47002,
    "c": 0.17309,
    "h": 263.8
  },
  "luminance": 0.09823
}

Semantic roles & 50–950 ramp

primary

#2551BA

secondary

#CBB070

accent

#B73EEA

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0A0A14

muted

#7C7C82

Preview Lab

Preview with #2551BA

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

Preview Lab → · Contrast checker → · Palette generator →