#2151A4#2151A4

#2151A4 is a mid, vivid blue. Relative luminance 0.089; OKLCH L 45.1% C 0.144 H 260.6°. Best body text is #FFFFFF at 7.56:1 contrast (WCAG AA passes).

Color values

HEX	#2151A4
RGB	rgb(33, 81, 164)
HSL	hsl(218, 66%, 39%)
HSV	hsv(218, 80%, 64%)
CMYK	cmyk(79.9%, 50.6%, 0%, 35.7%)
CIE-LAB	lab(35.77, 15.00, -49.41)
CIE-LCH	lch(35.77, 51.64, 286.89°)
OKLab	oklab(45.12% -0.0236 -0.1422)
OKLCH	oklch(45.12% 0.144 260.6)
XYZ	xyz(10.2680, 8.8873, 36.2890)
Luminance	0.0889 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2151A4 #A47421

analogous

#2192A4 #2151A4 #3221A4

triadic

#2151A4 #A42151 #51A421

tetradic

#2151A4 #A42192 #A47421 #21A432

square

#2151A4 #A42192 #A47421 #21A432

split-complementary

#2151A4 #A43221 #92A421

monochromatic

#0C1F3E #173871 #2151A4 #2D6BD5 #608FDF

Accessibility & contrast

On white

7.56

#2151A4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.78

#2151A4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2151A4

7.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2151A4	#FFFFFF	#000000	##FFFFFF
##2151A4	1.00	7.56	2.78	7.56
#FFFFFF	7.56	1.00	21.00	1.00
#000000	2.78	21.00	1.00	21.00
##FFFFFF	7.56	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1E5AA7

Deuteranopia (green-blind)

#004FA2

Tritanopia (blue-blind)

#006572

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #2151a4;
/* rgb */ color: rgb(33, 81, 164);
/* oklch */ color: oklch(45.1% 0.144 260.6);

Tailwind

colors: {
  custom: {
    50: '#7281c0',
    500: '#2151a4',
    950: '#000000',
  },
}

SCSS

$custom: #2151a4;
$custom-light: #7281c0;
$custom-dark: #000000;

JSON

{
  "hex": "#2151a4",
  "rgb": {
    "r": 33,
    "g": 81,
    "b": 164
  },
  "hsl": {
    "h": 218.015,
    "s": 66.497,
    "l": 38.627
  },
  "oklch": {
    "l": 0.45119,
    "c": 0.14413,
    "h": 260.6
  },
  "luminance": 0.08889
}

Semantic roles & 50–950 ramp

primary

#2151A4

secondary

#C49E5D

accent

#AB3EE9

background

#F7F7FB

surface

#EDEEF7

border

#C8C9D0

text

#090A12

muted

#7B7C81

Preview Lab

Preview with #2151A4

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

Preview Lab → · Contrast checker → · Palette generator →