#5178CE#5178CE

#5178CE is a mid, vivid blue. Relative luminance 0.196; OKLCH L 58.6% C 0.139 H 264.2°. Best body text is #000000 at 4.93:1 contrast (WCAG AA passes).

Color values

HEX	#5178CE
RGB	rgb(81, 120, 206)
HSL	hsl(221, 56%, 56%)
HSV	hsv(221, 61%, 81%)
CMYK	cmyk(60.7%, 41.7%, 0%, 19.2%)
CIE-LAB	lab(51.42, 12.83, -48.67)
CIE-LCH	lch(51.42, 50.33, 284.77°)
OKLab	oklab(58.55% -0.0141 -0.1386)
OKLCH	oklch(58.55% 0.139 264.2)
XYZ	xyz(21.2465, 19.6367, 61.0512)
Luminance	0.1964 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5178CE #CEA751

analogous

#51B7CE #5178CE #6951CE

triadic

#5178CE #CE5178 #78CE51

tetradic

#5178CE #CE51B7 #CEA751 #51CE69

square

#5178CE #CE51B7 #CEA751 #51CE69

split-complementary

#5178CE #CE6951 #B7CE51

monochromatic

#244180 #3259B0 #5178CE #819DDB #B1C2E9

Accessibility & contrast

On white

4.26

#5178CE on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.93

#5178CE on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #5178CE

4.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5178CE	#FFFFFF	#000000	##000000
##5178CE	1.00	4.26	4.93	4.93
#FFFFFF	4.26	1.00	21.00	21.00
#000000	4.93	21.00	1.00	1.00
##000000	4.93	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5281D1

Deuteranopia (green-blind)

#4075CC

Tritanopia (blue-blind)

#008B99

Achromatopsia (no color)

#7B7B7B

Design tokens & code

CSS

--color: #5178ce;
/* rgb */ color: rgb(81, 120, 206);
/* oklch */ color: oklch(58.6% 0.139 264.2);

Tailwind

colors: {
  custom: {
    50: '#8c9edd',
    500: '#5178ce',
    950: '#000000',
  },
}

SCSS

$custom: #5178ce;
$custom-light: #8c9edd;
$custom-dark: #000000;

JSON

{
  "hex": "#5178ce",
  "rgb": {
    "r": 81,
    "g": 120,
    "b": 206
  },
  "hsl": {
    "h": 221.28,
    "s": 56.054,
    "l": 56.275
  },
  "oklch": {
    "l": 0.58553,
    "c": 0.13928,
    "h": 264.2
  },
  "luminance": 0.19639
}

Semantic roles & 50–950 ramp

primary

#5178CE

secondary

#D7C7A4

accent

#B048DF

background

#F9F9FD

surface

#F1F2FB

border

#CBCCD4

text

#0D0E15

muted

#7E7E83

Preview Lab

Preview with #5178CE

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

Preview Lab → · Contrast checker → · Palette generator →