#5181BC#5181BC

#5181BC is a mid, moderate cyan. Relative luminance 0.211; OKLCH L 59.5% C 0.105 H 254.4°. Best body text is #000000 at 5.22:1 contrast (WCAG AA passes).

Color values

HEX	#5181BC
RGB	rgb(81, 129, 188)
HSL	hsl(213, 44%, 53%)
HSV	hsv(213, 57%, 74%)
CMYK	cmyk(56.9%, 31.4%, 0%, 26.3%)
CIE-LAB	lab(53.04, 1.39, -35.85)
CIE-LCH	lch(53.04, 35.88, 272.22°)
OKLab	oklab(59.5% -0.0283 -0.101)
OKLCH	oklch(59.5% 0.105 254.4)
XYZ	xyz(20.3175, 21.0790, 50.5652)
Luminance	0.2108 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5181BC #BC8C51

analogous

#51B6BC #5181BC #5651BC

triadic

#5181BC #BC5181 #81BC51

tetradic

#5181BC #BC51B6 #BC8C51 #51BC56

square

#5181BC #BC51B6 #BC8C51 #51BC56

split-complementary

#5181BC #BC5651 #B6BC51

monochromatic

#29466A #3A6396 #5181BC #7DA1CD #A9C1DE

Accessibility & contrast

On white

4.03

#5181BC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.22

#5181BC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #5181BC

5.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5181BC	#FFFFFF	#000000	##000000
##5181BC	1.00	4.03	5.22	5.22
#FFFFFF	4.03	1.00	21.00	21.00
#000000	5.22	21.00	1.00	1.00
##000000	5.22	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6984BF

Deuteranopia (green-blind)

#5B7ABB

Tritanopia (blue-blind)

#008E96

Achromatopsia (no color)

#7F7F7F

Design tokens & code

CSS

--color: #5181bc;
/* rgb */ color: rgb(81, 129, 188);
/* oklch */ color: oklch(59.5% 0.105 254.4);

Tailwind

colors: {
  custom: {
    50: '#8aa5d0',
    500: '#5181bc',
    950: '#000000',
  },
}

SCSS

$custom: #5181bc;
$custom-light: #8aa5d0;
$custom-dark: #000000;

JSON

{
  "hex": "#5181bc",
  "rgb": {
    "r": 81,
    "g": 129,
    "b": 188
  },
  "hsl": {
    "h": 213.084,
    "s": 44.398,
    "l": 52.745
  },
  "oklch": {
    "l": 0.59504,
    "c": 0.10492,
    "h": 254.4
  },
  "luminance": 0.21081
}

Semantic roles & 50–950 ramp

primary

#5181BC

secondary

#CCB79D

accent

#9B54D4

background

#F8FAFC

surface

#F0F4F9

border

#CBCED2

text

#0C0F14

muted

#7D7F82

Preview Lab

Preview with #5181BC

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

Preview Lab → · Contrast checker → · Palette generator →