#2151C2#2151C2

#2151C2 is a mid, vivid blue. Relative luminance 0.101; OKLCH L 47.5% C 0.185 H 263.5°. Best body text is #FFFFFF at 6.95:1 contrast (WCAG AA passes).

Color values

HEX	#2151C2
RGB	rgb(33, 81, 194)
HSL	hsl(222, 71%, 45%)
HSV	hsv(222, 83%, 76%)
CMYK	cmyk(83%, 58.2%, 0%, 23.9%)
CIE-LAB	lab(38.02, 26.74, -63.46)
CIE-LCH	lch(38.02, 68.87, 292.85°)
OKLab	oklab(47.54% -0.0209 -0.1835)
OKLCH	oklch(47.54% 0.185 263.5)
XYZ	xyz(13.3038, 10.1016, 52.2771)
Luminance	0.1010 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2151C2 #C29221

analogous

#21A2C2 #2151C2 #4221C2

triadic

#2151C2 #C22151 #51C221

tetradic

#2151C2 #C221A2 #C29221 #21C242

square

#2151C2 #C221A2 #C29221 #21C242

split-complementary

#2151C2 #C24221 #A2C221

monochromatic

#0F2559 #183B8E #2151C2 #4170DF #7698E8

Accessibility & contrast

On white

6.95

#2151C2 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.02

#2151C2 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #2151C2

6.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2151C2	#FFFFFF	#000000	##FFFFFF
##2151C2	1.00	6.95	3.02	6.95
#FFFFFF	6.95	1.00	21.00	1.00
#000000	3.02	21.00	1.00	21.00
##FFFFFF	6.95	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0061C6

Deuteranopia (green-blind)

#0052C0

Tritanopia (blue-blind)

#006E81

Achromatopsia (no color)

#595959

Design tokens & code

CSS

--color: #2151c2;
/* rgb */ color: rgb(33, 81, 194);
/* oklch */ color: oklch(47.5% 0.185 263.5);

Tailwind

colors: {
  custom: {
    50: '#7981d5',
    500: '#2151c2',
    950: '#000000',
  },
}

SCSS

$custom: #2151c2;
$custom-light: #7981d5;
$custom-dark: #000000;

JSON

{
  "hex": "#2151c2",
  "rgb": {
    "r": 33,
    "g": 81,
    "b": 194
  },
  "hsl": {
    "h": 222.112,
    "s": 70.925,
    "l": 44.51
  },
  "oklch": {
    "l": 0.47542,
    "c": 0.18467,
    "h": 263.5
  },
  "luminance": 0.10103
}

Semantic roles & 50–950 ramp

primary

#2151C2

secondary

#CFB370

accent

#B83AEE

background

#F8F7FD

surface

#EFEEFA

border

#CAC9D3

text

#0B0A14

muted

#7C7C83

Preview Lab

Preview with #2151C2

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

Preview Lab → · Contrast checker → · Palette generator →