#3181B4#3181B4

#3181B4 is a mid, moderate cyan. Relative luminance 0.196; OKLCH L 57.8% C 0.110 H 240.7°. Best body text is #000000 at 4.93:1 contrast (WCAG AA passes).

Color values

HEX	#3181B4
RGB	rgb(49, 129, 180)
HSL	hsl(203, 57%, 45%)
HSV	hsv(203, 73%, 71%)
CMYK	cmyk(72.8%, 28.3%, 0%, 29.4%)
CIE-LAB	lab(51.44, -7.03, -33.86)
CIE-LCH	lch(51.44, 34.58, 258.27°)
OKLab	oklab(57.78% -0.0538 -0.0956)
OKLCH	oklch(57.78% 0.11 240.7)
XYZ	xyz(17.3519, 19.6468, 46.0489)
Luminance	0.1965 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3181B4 #B46431

analogous

#31B4A6 #3181B4 #313FB4

triadic

#3181B4 #B43181 #81B431

tetradic

#3181B4 #A631B4 #B46431 #3FB431

square

#3181B4 #A631B4 #B46431 #3FB431

split-complementary

#3181B4 #B4313F #B4A631

monochromatic

#173C54 #245F84 #3181B4 #529FD0 #82BADD

Accessibility & contrast

On white

4.26

#3181B4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.93

#3181B4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3181B4

4.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3181B4	#FFFFFF	#000000	##000000
##3181B4	1.00	4.26	4.93	4.93
#FFFFFF	4.26	1.00	21.00	21.00
#000000	4.93	21.00	1.00	1.00
##000000	4.93	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6982B6

Deuteranopia (green-blind)

#5775B3

Tritanopia (blue-blind)

#008E93

Achromatopsia (no color)

#7B7B7B

Design tokens & code

CSS

--color: #3181b4;
/* rgb */ color: rgb(49, 129, 180);
/* oklch */ color: oklch(57.8% 0.110 240.7);

Tailwind

colors: {
  custom: {
    50: '#7aa5ca',
    500: '#3181b4',
    950: '#000000',
  },
}

SCSS

$custom: #3181b4;
$custom-light: #7aa5ca;
$custom-dark: #000000;

JSON

{
  "hex": "#3181b4",
  "rgb": {
    "r": 49,
    "g": 129,
    "b": 180
  },
  "hsl": {
    "h": 203.359,
    "s": 57.205,
    "l": 44.902
  },
  "oklch": {
    "l": 0.57781,
    "c": 0.10971,
    "h": 240.7
  },
  "luminance": 0.19649
}

Semantic roles & 50–950 ramp

primary

#3181B4

secondary

#C6987B

accent

#8347E0

background

#F8FAFC

surface

#EFF4F8

border

#CACED1

text

#0A0F13

muted

#7C7F82

Preview Lab

Preview with #3181B4

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

Preview Lab → · Contrast checker → · Palette generator →