#2551AC#2551AC

#2551AC is a mid, vivid blue. Relative luminance 0.093; OKLCH L 45.9% C 0.154 H 262.6°. Best body text is #FFFFFF at 7.36:1 contrast (WCAG AA passes).

Color values

HEX	#2551AC
RGB	rgb(37, 81, 172)
HSL	hsl(220, 65%, 41%)
HSV	hsv(220, 78%, 67%)
CMYK	cmyk(78.5%, 52.9%, 0%, 32.5%)
CIE-LAB	lab(36.47, 18.59, -53.03)
CIE-LCH	lch(36.47, 56.20, 289.32°)
OKLab	oklab(45.88% -0.0199 -0.1528)
OKLCH	oklch(45.88% 0.154 262.6)
XYZ	xyz(11.1491, 9.2554, 40.2206)
Luminance	0.0926 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2551AC #AC8025

analogous

#2594AC #2551AC #3C25AC

triadic

#2551AC #AC2551 #51AC25

tetradic

#2551AC #AC2594 #AC8025 #25AC3C

square

#2551AC #AC2594 #AC8025 #25AC3C

split-complementary

#2551AC #AC3C25 #94AC25

monochromatic

#0F2247 #1A397A #2551AC #3A6CD5 #6C92DF

Accessibility & contrast

On white

7.36

#2551AC on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.85

#2551AC on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2551AC

7.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2551AC	#FFFFFF	#000000	##FFFFFF
##2551AC	1.00	7.36	2.85	7.36
#FFFFFF	7.36	1.00	21.00	1.00
#000000	2.85	21.00	1.00	21.00
##FFFFFF	7.36	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0F5CAF

Deuteranopia (green-blind)

#0050AA

Tritanopia (blue-blind)

#006776

Achromatopsia (no color)

#565656

Design tokens & code

CSS

--color: #2551ac;
/* rgb */ color: rgb(37, 81, 172);
/* oklch */ color: oklch(45.9% 0.154 262.6);

Tailwind

colors: {
  custom: {
    50: '#7581c5',
    500: '#2551ac',
    950: '#000000',
  },
}

SCSS

$custom: #2551ac;
$custom-light: #7581c5;
$custom-dark: #000000;

JSON

{
  "hex": "#2551ac",
  "rgb": {
    "r": 37,
    "g": 81,
    "b": 172
  },
  "hsl": {
    "h": 220.444,
    "s": 64.593,
    "l": 40.98
  },
  "oklch": {
    "l": 0.45876,
    "c": 0.15407,
    "h": 262.6
  },
  "luminance": 0.09257
}

Semantic roles & 50–950 ramp

primary

#2551AC

secondary

#C6A767

accent

#B140E8

background

#F7F7FC

surface

#EEEEF8

border

#C9C9D1

text

#0A0A13

muted

#7C7C82

Preview Lab

Preview with #2551AC

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

Preview Lab → · Contrast checker → · Palette generator →