#5178CB#5178CB

#5178CB is a mid, vivid blue. Relative luminance 0.195; OKLCH L 58.4% C 0.135 H 263.8°. Best body text is #000000 at 4.90:1 contrast (WCAG AA passes).

Color values

HEX	#5178CB
RGB	rgb(81, 120, 203)
HSL	hsl(221, 54%, 56%)
HSV	hsv(221, 60%, 80%)
CMYK	cmyk(60.1%, 40.9%, 0%, 20.4%)
CIE-LAB	lab(51.26, 11.82, -47.23)
CIE-LCH	lch(51.26, 48.68, 284.05°)
OKLab	oklab(58.37% -0.0147 -0.1343)
OKLCH	oklch(58.37% 0.135 263.8)
XYZ	xyz(20.8856, 19.4923, 59.1501)
Luminance	0.1949 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5178CB #CBA451

analogous

#51B5CB #5178CB #6751CB

triadic

#5178CB #CB5178 #78CB51

tetradic

#5178CB #CB51B5 #CBA451 #51CB67

square

#5178CB #CB51B5 #CBA451 #51CB67

split-complementary

#5178CB #CB6751 #B5CB51

monochromatic

#25417C #335AAC #5178CB #809DD9 #AFC1E7

Accessibility & contrast

On white

4.29

#5178CB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.90

#5178CB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #5178CB

4.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5178CB	#FFFFFF	#000000	##000000
##5178CB	1.00	4.29	4.90	4.90
#FFFFFF	4.29	1.00	21.00	21.00
#000000	4.90	21.00	1.00	1.00
##000000	4.90	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5480CE

Deuteranopia (green-blind)

#4375C9

Tritanopia (blue-blind)

#008B98

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #5178cb;
/* rgb */ color: rgb(81, 120, 203);
/* oklch */ color: oklch(58.4% 0.135 263.8);

Tailwind

colors: {
  custom: {
    50: '#8c9edb',
    500: '#5178cb',
    950: '#000000',
  },
}

SCSS

$custom: #5178cb;
$custom-light: #8c9edb;
$custom-dark: #000000;

JSON

{
  "hex": "#5178cb",
  "rgb": {
    "r": 81,
    "g": 120,
    "b": 203
  },
  "hsl": {
    "h": 220.82,
    "s": 53.982,
    "l": 55.686
  },
  "oklch": {
    "l": 0.58372,
    "c": 0.13512,
    "h": 263.8
  },
  "luminance": 0.19494
}

Semantic roles & 50–950 ramp

primary

#5178CB

secondary

#D5C5A3

accent

#AE4ADD

background

#F9F9FD

surface

#F1F2FB

border

#CBCCD4

text

#0D0E15

muted

#7E7E83

Preview Lab

Preview with #5178CB

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

Preview Lab → · Contrast checker → · Palette generator →