#5178BB#5178BB

#5178BB is a mid, moderate blue. Relative luminance 0.188; OKLCH L 57.4% C 0.113 H 260.7°. Best body text is #000000 at 4.75:1 contrast (WCAG AA passes).

Color values

HEX	#5178BB
RGB	rgb(81, 120, 187)
HSL	hsl(218, 44%, 53%)
HSV	hsv(218, 57%, 73%)
CMYK	cmyk(56.7%, 35.8%, 0%, 26.7%)
CIE-LAB	lab(50.42, 6.47, -39.40)
CIE-LCH	lch(50.42, 39.93, 279.33°)
OKLab	oklab(57.44% -0.0183 -0.1114)
OKLCH	oklch(57.44% 0.113 260.7)
XYZ	xyz(19.0764, 18.7686, 49.6215)
Luminance	0.1877 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5178BB #BB9451

analogous

#51ADBB #5178BB #5F51BB

triadic

#5178BB #BB5178 #78BB51

tetradic

#5178BB #BB51AD #BB9451 #51BB5F

square

#5178BB #BB51AD #BB9451 #51BB5F

split-complementary

#5178BB #BB5F51 #ADBB51

monochromatic

#294069 #3A5B95 #5178BB #7D9ACC #A9BCDD

Accessibility & contrast

On white

4.42

#5178BB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.75

#5178BB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #5178BB

4.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5178BB	#FFFFFF	#000000	##000000
##5178BB	1.00	4.42	4.75	4.75
#FFFFFF	4.42	1.00	21.00	21.00
#000000	4.75	21.00	1.00	1.00
##000000	4.75	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5D7DBE

Deuteranopia (green-blind)

#4F73BA

Tritanopia (blue-blind)

#008791

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #5178bb;
/* rgb */ color: rgb(81, 120, 187);
/* oklch */ color: oklch(57.4% 0.113 260.7);

Tailwind

colors: {
  custom: {
    50: '#8a9ed0',
    500: '#5178bb',
    950: '#000000',
  },
}

SCSS

$custom: #5178bb;
$custom-light: #8a9ed0;
$custom-dark: #000000;

JSON

{
  "hex": "#5178bb",
  "rgb": {
    "r": 81,
    "g": 120,
    "b": 187
  },
  "hsl": {
    "h": 217.925,
    "s": 43.802,
    "l": 52.549
  },
  "oklch": {
    "l": 0.57444,
    "c": 0.11293,
    "h": 260.7
  },
  "luminance": 0.1877
}

Semantic roles & 50–950 ramp

primary

#5178BB

secondary

#CBBA9D

accent

#A554D4

background

#F8F9FC

surface

#F0F2F9

border

#CBCCD2

text

#0C0E14

muted

#7D7E82

Preview Lab

Preview with #5178BB

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

Preview Lab → · Contrast checker → · Palette generator →