#3181B3#3181B3

#3181B3 is a mid, moderate cyan. Relative luminance 0.196; OKLCH L 57.7% C 0.109 H 240.1°. Best body text is #000000 at 4.92:1 contrast (WCAG AA passes).

Color values

HEX	#3181B3
RGB	rgb(49, 129, 179)
HSL	hsl(203, 57%, 45%)
HSV	hsv(203, 73%, 70%)
CMYK	cmyk(72.6%, 27.9%, 0%, 29.8%)
CIE-LAB	lab(51.39, -7.38, -33.35)
CIE-LCH	lch(51.39, 34.16, 257.52°)
OKLab	oklab(57.73% -0.0541 -0.0942)
OKLCH	oklch(57.73% 0.109 240.1)
XYZ	xyz(17.2504, 19.6062, 45.5143)
Luminance	0.1961 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3181B3 #B36331

analogous

#31B3A4 #3181B3 #3140B3

triadic

#3181B3 #B33181 #81B331

tetradic

#3181B3 #A431B3 #B36331 #40B331

square

#3181B3 #A431B3 #B36331 #40B331

split-complementary

#3181B3 #B33140 #B3A431

monochromatic

#173C53 #245E83 #3181B3 #529FD0 #82BADD

Accessibility & contrast

On white

4.27

#3181B3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.92

#3181B3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3181B3

4.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3181B3	#FFFFFF	#000000	##000000
##3181B3	1.00	4.27	4.92	4.92
#FFFFFF	4.27	1.00	21.00	21.00
#000000	4.92	21.00	1.00	1.00
##000000	4.92	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6A81B5

Deuteranopia (green-blind)

#5875B2

Tritanopia (blue-blind)

#008E92

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #3181b3;
/* rgb */ color: rgb(49, 129, 179);
/* oklch */ color: oklch(57.7% 0.109 240.1);

Tailwind

colors: {
  custom: {
    50: '#7aa5ca',
    500: '#3181b3',
    950: '#000000',
  },
}

SCSS

$custom: #3181b3;
$custom-light: #7aa5ca;
$custom-dark: #000000;

JSON

{
  "hex": "#3181b3",
  "rgb": {
    "r": 49,
    "g": 129,
    "b": 179
  },
  "hsl": {
    "h": 203.077,
    "s": 57.018,
    "l": 44.706
  },
  "oklch": {
    "l": 0.57729,
    "c": 0.10859,
    "h": 240.1
  },
  "luminance": 0.19608
}

Semantic roles & 50–950 ramp

primary

#3181B3

secondary

#C6977A

accent

#8248E0

background

#F8FAFC

surface

#EFF4F8

border

#CACED1

text

#0A0F13

muted

#7C7F82

Preview Lab

Preview with #3181B3

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

Preview Lab → · Contrast checker → · Palette generator →