#2551AA#2551AA

#2551AA is a mid, vivid blue. Relative luminance 0.092; OKLCH L 45.7% C 0.151 H 262.3°. Best body text is #FFFFFF at 7.40:1 contrast (WCAG AA passes).

Color values

HEX	#2551AA
RGB	rgb(37, 81, 170)
HSL	hsl(220, 64%, 41%)
HSV	hsv(220, 78%, 67%)
CMYK	cmyk(78.2%, 52.4%, 0%, 33.3%)
CIE-LAB	lab(36.33, 17.81, -52.08)
CIE-LCH	lch(36.33, 55.04, 288.88°)
OKLab	oklab(45.72% -0.0201 -0.15)
OKLCH	oklch(45.72% 0.151 262.3)
XYZ	xyz(10.9585, 9.1792, 39.2166)
Luminance	0.0918 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2551AA #AA7E25

analogous

#2593AA #2551AA #3B25AA

triadic

#2551AA #AA2551 #51AA25

tetradic

#2551AA #AA2593 #AA7E25 #25AA3B

square

#2551AA #AA2593 #AA7E25 #25AA3B

split-complementary

#2551AA #AA3B25 #93AA25

monochromatic

#0F2145 #1A3978 #2551AA #386CD4 #6B91DF

Accessibility & contrast

On white

7.40

#2551AA on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.84

#2551AA on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2551AA

7.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2551AA	#FFFFFF	#000000	##FFFFFF
##2551AA	1.00	7.40	2.84	7.40
#FFFFFF	7.40	1.00	21.00	1.00
#000000	2.84	21.00	1.00	21.00
##FFFFFF	7.40	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#145CAD

Deuteranopia (green-blind)

#0050A8

Tritanopia (blue-blind)

#006775

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #2551aa;
/* rgb */ color: rgb(37, 81, 170);
/* oklch */ color: oklch(45.7% 0.151 262.3);

Tailwind

colors: {
  custom: {
    50: '#7481c4',
    500: '#2551aa',
    950: '#000000',
  },
}

SCSS

$custom: #2551aa;
$custom-light: #7481c4;
$custom-dark: #000000;

JSON

{
  "hex": "#2551aa",
  "rgb": {
    "r": 37,
    "g": 81,
    "b": 170
  },
  "hsl": {
    "h": 220.15,
    "s": 64.251,
    "l": 40.588
  },
  "oklch": {
    "l": 0.45721,
    "c": 0.15132,
    "h": 262.3
  },
  "luminance": 0.0918
}

Semantic roles & 50–950 ramp

primary

#2551AA

secondary

#C5A566

accent

#B041E7

background

#F7F7FC

surface

#EEEEF8

border

#C9C9D1

text

#0A0A13

muted

#7C7C82

Preview Lab

Preview with #2551AA

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

Preview Lab → · Contrast checker → · Palette generator →