#3181B1#3181B1

#3181B1 is a mid, moderate cyan. Relative luminance 0.195; OKLCH L 57.6% C 0.106 H 239.0°. Best body text is #000000 at 4.91:1 contrast (WCAG AA passes).

Color values

HEX	#3181B1
RGB	rgb(49, 129, 177)
HSL	hsl(203, 57%, 44%)
HSV	hsv(203, 72%, 69%)
CMYK	cmyk(72.3%, 27.1%, 0%, 30.6%)
CIE-LAB	lab(51.30, -8.09, -32.34)
CIE-LCH	lch(51.30, 33.34, 255.96°)
OKLab	oklab(57.63% -0.0547 -0.0912)
OKLCH	oklch(57.63% 0.106 239)
XYZ	xyz(17.0496, 19.5259, 44.4568)
Luminance	0.1953 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3181B1 #B16131

analogous

#31B1A1 #3181B1 #3141B1

triadic

#3181B1 #B13181 #81B131

tetradic

#3181B1 #A131B1 #B16131 #41B131

square

#3181B1 #A131B1 #B16131 #41B131

split-complementary

#3181B1 #B13141 #B1A131

monochromatic

#163B51 #245E81 #3181B1 #519FCF #80BADC

Accessibility & contrast

On white

4.28

#3181B1 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.91

#3181B1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3181B1

4.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3181B1	#FFFFFF	#000000	##000000
##3181B1	1.00	4.28	4.91	4.91
#FFFFFF	4.28	1.00	21.00	21.00
#000000	4.91	21.00	1.00	1.00
##000000	4.91	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6B81B3

Deuteranopia (green-blind)

#5975B0

Tritanopia (blue-blind)

#008D92

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #3181b1;
/* rgb */ color: rgb(49, 129, 177);
/* oklch */ color: oklch(57.6% 0.106 239.0);

Tailwind

colors: {
  custom: {
    50: '#7aa5c8',
    500: '#3181b1',
    950: '#000000',
  },
}

SCSS

$custom: #3181b1;
$custom-light: #7aa5c8;
$custom-dark: #000000;

JSON

{
  "hex": "#3181b1",
  "rgb": {
    "r": 49,
    "g": 129,
    "b": 177
  },
  "hsl": {
    "h": 202.5,
    "s": 56.637,
    "l": 44.314
  },
  "oklch": {
    "l": 0.57626,
    "c": 0.10641,
    "h": 239
  },
  "luminance": 0.19528
}

Semantic roles & 50–950 ramp

primary

#3181B1

secondary

#C59579

accent

#8148E0

background

#F8FAFC

surface

#EFF4F8

border

#CACED1

text

#0A0F13

muted

#7C7F82

Preview Lab

Preview with #3181B1

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

Preview Lab → · Contrast checker → · Palette generator →