#5181BB#5181BB

#5181BB is a mid, moderate cyan. Relative luminance 0.210; OKLCH L 59.5% C 0.104 H 254.0°. Best body text is #000000 at 5.21:1 contrast (WCAG AA passes).

Color values

HEX	#5181BB
RGB	rgb(81, 129, 187)
HSL	hsl(213, 44%, 53%)
HSV	hsv(213, 57%, 73%)
CMYK	cmyk(56.7%, 31%, 0%, 26.7%)
CIE-LAB	lab(52.99, 1.07, -35.35)
CIE-LCH	lch(52.99, 35.37, 271.73°)
OKLab	oklab(59.45% -0.0286 -0.0996)
OKLCH	oklch(59.45% 0.104 254)
XYZ	xyz(20.2101, 21.0360, 49.9994)
Luminance	0.2104 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5181BB #BB8B51

analogous

#51B6BB #5181BB #5651BB

triadic

#5181BB #BB5181 #81BB51

tetradic

#5181BB #BB51B6 #BB8B51 #51BB56

square

#5181BB #BB51B6 #BB8B51 #51BB56

split-complementary

#5181BB #BB5651 #B6BB51

monochromatic

#294669 #3A6395 #5181BB #7DA1CC #A9C1DD

Accessibility & contrast

On white

4.03

#5181BB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.21

#5181BB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #5181BB

5.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5181BB	#FFFFFF	#000000	##000000
##5181BB	1.00	4.03	5.21	5.21
#FFFFFF	4.03	1.00	21.00	21.00
#000000	5.21	21.00	1.00	1.00
##000000	5.21	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6984BD

Deuteranopia (green-blind)

#5C7ABA

Tritanopia (blue-blind)

#008E96

Achromatopsia (no color)

#7E7E7E

Design tokens & code

CSS

--color: #5181bb;
/* rgb */ color: rgb(81, 129, 187);
/* oklch */ color: oklch(59.5% 0.104 254.0);

Tailwind

colors: {
  custom: {
    50: '#8aa5cf',
    500: '#5181bb',
    950: '#000000',
  },
}

SCSS

$custom: #5181bb;
$custom-light: #8aa5cf;
$custom-dark: #000000;

JSON

{
  "hex": "#5181bb",
  "rgb": {
    "r": 81,
    "g": 129,
    "b": 187
  },
  "hsl": {
    "h": 212.83,
    "s": 43.802,
    "l": 52.549
  },
  "oklch": {
    "l": 0.59452,
    "c": 0.1036,
    "h": 254
  },
  "luminance": 0.21038
}

Semantic roles & 50–950 ramp

primary

#5181BB

secondary

#CBB69D

accent

#9A54D4

background

#F8FAFC

surface

#F0F4F9

border

#CBCED2

text

#0C0F14

muted

#7D7F82

Preview Lab

Preview with #5181BB

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

Preview Lab → · Contrast checker → · Palette generator →