#3B81BB#3B81BB

#3B81BB is a mid, moderate cyan. Relative luminance 0.202; OKLCH L 58.5% C 0.114 H 246.4°. Best body text is #000000 at 5.04:1 contrast (WCAG AA passes).

Color values

HEX	#3B81BB
RGB	rgb(59, 129, 187)
HSL	hsl(207, 52%, 48%)
HSV	hsv(207, 68%, 73%)
CMYK	cmyk(68.4%, 31%, 0%, 26.7%)
CIE-LAB	lab(52.08, -3.06, -36.84)
CIE-LCH	lch(52.08, 36.97, 265.25°)
OKLab	oklab(58.49% -0.0454 -0.1042)
OKLCH	oklch(58.49% 0.114 246.4)
XYZ	xyz(18.6201, 20.2162, 49.9249)
Luminance	0.2022 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3B81BB #BB753B

analogous

#3BBBB5 #3B81BB #3B41BB

triadic

#3B81BB #BB3B81 #81BB3B

tetradic

#3B81BB #B53BBB #BB753B #41BB3B

square

#3B81BB #B53BBB #BB753B #41BB3B

split-complementary

#3B81BB #BB3B41 #BBB53B

monochromatic

#1E415E #2C618C #3B81BB #659FCE #93BCDD

Accessibility & contrast

On white

4.16

#3B81BB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.04

#3B81BB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3B81BB

5.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3B81BB	#FFFFFF	#000000	##000000
##3B81BB	1.00	4.16	5.04	5.04
#FFFFFF	4.16	1.00	21.00	21.00
#000000	5.04	21.00	1.00	1.00
##000000	5.04	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6783BE

Deuteranopia (green-blind)

#5577BA

Tritanopia (blue-blind)

#008F96

Achromatopsia (no color)

#7C7C7C

Design tokens & code

CSS

--color: #3b81bb;
/* rgb */ color: rgb(59, 129, 187);
/* oklch */ color: oklch(58.5% 0.114 246.4);

Tailwind

colors: {
  custom: {
    50: '#7fa5cf',
    500: '#3b81bb',
    950: '#000000',
  },
}

SCSS

$custom: #3b81bb;
$custom-light: #7fa5cf;
$custom-dark: #000000;

JSON

{
  "hex": "#3b81bb",
  "rgb": {
    "r": 59,
    "g": 129,
    "b": 187
  },
  "hsl": {
    "h": 207.188,
    "s": 52.033,
    "l": 48.235
  },
  "oklch": {
    "l": 0.58489,
    "c": 0.11368,
    "h": 246.4
  },
  "luminance": 0.20218
}

Semantic roles & 50–950 ramp

primary

#3B81BB

secondary

#C8A68A

accent

#8D4CDB

background

#F8FAFC

surface

#EFF4F9

border

#CACED2

text

#0B0F14

muted

#7C7F82

Preview Lab

Preview with #3B81BB

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

Preview Lab → · Contrast checker → · Palette generator →