#3F81CA#3F81CA

#3F81CA is a mid, vivid cyan. Relative luminance 0.210; OKLCH L 59.5% C 0.131 H 252.9°. Best body text is #000000 at 5.20:1 contrast (WCAG AA passes).

Color values

HEX	#3F81CA
RGB	rgb(63, 129, 202)
HSL	hsl(212, 57%, 52%)
HSV	hsv(212, 69%, 79%)
CMYK	cmyk(68.8%, 36.1%, 0%, 20.8%)
CIE-LAB	lab(52.97, 2.84, -43.99)
CIE-LCH	lch(52.97, 44.08, 273.70°)
OKLab	oklab(59.47% -0.0386 -0.125)
OKLCH	oklch(59.47% 0.131 252.9)
XYZ	xyz(20.5569, 21.0194, 58.8394)
Luminance	0.2102 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F81CA #CA883F

analogous

#3FC7CA #3F81CA #433FCA

triadic

#3F81CA #CA3F81 #81CA3F

tetradic

#3F81CA #CA3FC7 #CA883F #3FCA43

square

#3F81CA #CA3FC7 #CA883F #3FCA43

split-complementary

#3F81CA #CA433F #C7CA3F

monochromatic

#1F4570 #2C63A0 #3F81CA #6FA0D7 #9FC0E4

Accessibility & contrast

On white

4.04

#3F81CA on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.20

#3F81CA on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F81CA

5.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F81CA	#FFFFFF	#000000	##000000
##3F81CA	1.00	4.04	5.20	5.20
#FFFFFF	4.04	1.00	21.00	21.00
#000000	5.20	21.00	1.00	1.00
##000000	5.20	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6086CD

Deuteranopia (green-blind)

#4C79C9

Tritanopia (blue-blind)

#00929C

Achromatopsia (no color)

#7E7E7E

Design tokens & code

CSS

--color: #3f81ca;
/* rgb */ color: rgb(63, 129, 202);
/* oklch */ color: oklch(59.5% 0.131 252.9);

Tailwind

colors: {
  custom: {
    50: '#83a5da',
    500: '#3f81ca',
    950: '#000000',
  },
}

SCSS

$custom: #3f81ca;
$custom-light: #83a5da;
$custom-dark: #000000;

JSON

{
  "hex": "#3f81ca",
  "rgb": {
    "r": 63,
    "g": 129,
    "b": 202
  },
  "hsl": {
    "h": 211.511,
    "s": 56.735,
    "l": 51.961
  },
  "oklch": {
    "l": 0.59472,
    "c": 0.13082,
    "h": 252.9
  },
  "luminance": 0.21022
}

Semantic roles & 50–950 ramp

primary

#3F81CA

secondary

#D1B494

accent

#9848E0

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C0F15

muted

#7D7F83

Preview Lab

Preview with #3F81CA

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

Preview Lab → · Contrast checker → · Palette generator →