#3B81CF#3B81CF

#3B81CF is a mid, vivid cyan. Relative luminance 0.211; OKLCH L 59.6% C 0.139 H 253.2°. Best body text is #000000 at 5.23:1 contrast (WCAG AA passes).

Color values

HEX	#3B81CF
RGB	rgb(59, 129, 207)
HSL	hsl(212, 61%, 52%)
HSV	hsv(212, 71%, 81%)
CMYK	cmyk(71.5%, 37.7%, 0%, 18.8%)
CIE-LAB	lab(53.09, 4.03, -46.64)
CIE-LCH	lch(53.09, 46.81, 274.94°)
OKLab	oklab(59.62% -0.04 -0.1328)
OKLCH	oklch(59.62% 0.139 253.2)
XYZ	xyz(20.9122, 21.1330, 61.9963)
Luminance	0.2114 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3B81CF #CF893B

analogous

#3BCBCF #3B81CF #3F3BCF

triadic

#3B81CF #CF3B81 #81CF3B

tetradic

#3B81CF #CF3BCB #CF893B #3BCF3F

square

#3B81CF #CF3BCB #CF893B #3BCF3F

split-complementary

#3B81CF #CF3F3B #CBCF3B

monochromatic

#1C4573 #2863A5 #3B81CF #6CA1DB #9DC0E7

Accessibility & contrast

On white

4.02

#3B81CF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.23

#3B81CF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3B81CF

5.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3B81CF	#FFFFFF	#000000	##000000
##3B81CF	1.00	4.02	5.23	5.23
#FFFFFF	4.02	1.00	21.00	21.00
#000000	5.23	21.00	1.00	1.00
##000000	5.23	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5D86D2

Deuteranopia (green-blind)

#4778CD

Tritanopia (blue-blind)

#00939E

Achromatopsia (no color)

#7F7F7F

Design tokens & code

CSS

--color: #3b81cf;
/* rgb */ color: rgb(59, 129, 207);
/* oklch */ color: oklch(59.6% 0.139 253.2);

Tailwind

colors: {
  custom: {
    50: '#83a5de',
    500: '#3b81cf',
    950: '#000000',
  },
}

SCSS

$custom: #3b81cf;
$custom-light: #83a5de;
$custom-dark: #000000;

JSON

{
  "hex": "#3b81cf",
  "rgb": {
    "r": 59,
    "g": 129,
    "b": 207
  },
  "hsl": {
    "h": 211.622,
    "s": 60.656,
    "l": 52.157
  },
  "oklch": {
    "l": 0.59616,
    "c": 0.13871,
    "h": 253.2
  },
  "luminance": 0.21135
}

Semantic roles & 50–950 ramp

primary

#3B81CF

secondary

#D3B593

accent

#9844E4

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C0F15

muted

#7D7F83

Preview Lab

Preview with #3B81CF

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

Preview Lab → · Contrast checker → · Palette generator →