#3181D0#3181D0

#3181D0 is a mid, vivid cyan. Relative luminance 0.209; OKLCH L 59.4% C 0.143 H 251.4°. Best body text is #000000 at 5.18:1 contrast (WCAG AA passes).

Color values

HEX	#3181D0
RGB	rgb(49, 129, 208)
HSL	hsl(210, 63%, 50%)
HSV	hsv(210, 76%, 82%)
CMYK	cmyk(76.4%, 38%, 0%, 18.4%)
CIE-LAB	lab(52.85, 3.09, -47.62)
CIE-LCH	lch(52.85, 47.72, 273.72°)
OKLab	oklab(59.35% -0.0457 -0.1358)
OKLCH	oklch(59.35% 0.143 251.4)
XYZ	xyz(20.4978, 20.9051, 62.6171)
Luminance	0.2091 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3181D0 #D08031

analogous

#31D0CF #3181D0 #3132D0

triadic

#3181D0 #D03181 #81D031

tetradic

#3181D0 #CF31D0 #D08031 #32D031

square

#3181D0 #CF31D0 #D08031 #32D031

split-complementary

#3181D0 #D03132 #D0CF31

monochromatic

#19446E #24629F #3181D0 #639FDB #95BEE7

Accessibility & contrast

On white

4.05

#3181D0 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.18

#3181D0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3181D0

5.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3181D0	#FFFFFF	#000000	##000000
##3181D0	1.00	4.05	5.18	5.18
#FFFFFF	4.05	1.00	21.00	21.00
#000000	5.18	21.00	1.00	1.00
##000000	5.18	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5C86D3

Deuteranopia (green-blind)

#4377CE

Tritanopia (blue-blind)

#00949E

Achromatopsia (no color)

#7E7E7E

Design tokens & code

CSS

--color: #3181d0;
/* rgb */ color: rgb(49, 129, 208);
/* oklch */ color: oklch(59.4% 0.143 251.4);

Tailwind

colors: {
  custom: {
    50: '#7fa5df',
    500: '#3181d0',
    950: '#000000',
  },
}

SCSS

$custom: #3181d0;
$custom-light: #7fa5df;
$custom-dark: #000000;

JSON

{
  "hex": "#3181d0",
  "rgb": {
    "r": 49,
    "g": 129,
    "b": 208
  },
  "hsl": {
    "h": 209.811,
    "s": 62.846,
    "l": 50.392
  },
  "oklch": {
    "l": 0.59353,
    "c": 0.14331,
    "h": 251.4
  },
  "luminance": 0.20908
}

Semantic roles & 50–950 ramp

primary

#3181D0

secondary

#D2AE8B

accent

#9342E6

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C0F15

muted

#7D7F83

Preview Lab

Preview with #3181D0

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

Preview Lab → · Contrast checker → · Palette generator →