#2551CA#2551CA

#2551CA is a mid, vivid blue. Relative luminance 0.105; OKLCH L 48.4% C 0.194 H 264.7°. Best body text is #FFFFFF at 6.76:1 contrast (WCAG AA passes).

Color values

HEX	#2551CA
RGB	rgb(37, 81, 202)
HSL	hsl(224, 69%, 47%)
HSV	hsv(224, 82%, 79%)
CMYK	cmyk(81.7%, 59.9%, 0%, 20.8%)
CIE-LAB	lab(38.80, 30.13, -66.85)
CIE-LCH	lch(38.80, 73.32, 294.26°)
OKLab	oklab(48.36% -0.018 -0.1934)
OKLCH	oklch(48.36% 0.194 264.7)
XYZ	xyz(14.3623, 10.5407, 57.1433)
Luminance	0.1054 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2551CA #CA9E25

analogous

#25A4CA #2551CA #4C25CA

triadic

#2551CA #CA2551 #51CA25

tetradic

#2551CA #CA25A4 #CA9E25 #25CA4C

square

#2551CA #CA25A4 #CA9E25 #25CA4C

split-complementary

#2551CA #CA4C25 #A4CA25

monochromatic

#122863 #1C3C96 #2551CA #4E74DF #819DE8

Accessibility & contrast

On white

6.76

#2551CA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.11

#2551CA on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #2551CA

6.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2551CA	#FFFFFF	#000000	##FFFFFF
##2551CA	1.00	6.76	3.11	6.76
#FFFFFF	6.76	1.00	21.00	1.00
#000000	3.11	21.00	1.00	21.00
##FFFFFF	6.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0063CE

Deuteranopia (green-blind)

#0054C8

Tritanopia (blue-blind)

#007085

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #2551ca;
/* rgb */ color: rgb(37, 81, 202);
/* oklch */ color: oklch(48.4% 0.194 264.7);

Tailwind

colors: {
  custom: {
    50: '#7c81db',
    500: '#2551ca',
    950: '#000000',
  },
}

SCSS

$custom: #2551ca;
$custom-light: #7c81db;
$custom-dark: #000000;

JSON

{
  "hex": "#2551ca",
  "rgb": {
    "r": 37,
    "g": 81,
    "b": 202
  },
  "hsl": {
    "h": 224,
    "s": 69.038,
    "l": 46.863
  },
  "oklch": {
    "l": 0.48356,
    "c": 0.1942,
    "h": 264.7
  },
  "luminance": 0.10542
}

Semantic roles & 50–950 ramp

primary

#2551CA

secondary

#D1BA7A

accent

#BD3CEC

background

#F8F7FD

surface

#F0EEFB

border

#CBC9D4

text

#0B0A15

muted

#7C7C83

Preview Lab

Preview with #2551CA

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

Preview Lab → · Contrast checker → · Palette generator →