#3F81CF#3F81CF

#3F81CF is a mid, vivid cyan. Relative luminance 0.213; OKLCH L 59.8% C 0.137 H 254.2°. Best body text is #000000 at 5.25:1 contrast (WCAG AA passes).

Color values

HEX	#3F81CF
RGB	rgb(63, 129, 207)
HSL	hsl(213, 60%, 53%)
HSV	hsv(213, 70%, 81%)
CMYK	cmyk(69.6%, 37.7%, 0%, 18.8%)
CIE-LAB	lab(53.23, 4.61, -46.41)
CIE-LCH	lch(53.23, 46.64, 275.68°)
OKLab	oklab(59.76% -0.0373 -0.1321)
OKLCH	oklch(59.76% 0.137 254.2)
XYZ	xyz(21.1585, 21.2600, 62.0079)
Luminance	0.2126 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F81CF #CF8D3F

analogous

#3FC9CF #3F81CF #453FCF

triadic

#3F81CF #CF3F81 #81CF3F

tetradic

#3F81CF #CF3FC9 #CF8D3F #3FCF45

square

#3F81CF #CF3FC9 #CF8D3F #3FCF45

split-complementary

#3F81CF #CF453F #C9CF3F

monochromatic

#1E4676 #2A63A7 #3F81CF #70A1DB #A1C1E7

Accessibility & contrast

On white

4.00

#3F81CF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.25

#3F81CF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F81CF

5.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F81CF	#FFFFFF	#000000	##000000
##3F81CF	1.00	4.00	5.25	5.25
#FFFFFF	4.00	1.00	21.00	21.00
#000000	5.25	21.00	1.00	1.00
##000000	5.25	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5E86D2

Deuteranopia (green-blind)

#4879CD

Tritanopia (blue-blind)

#00939E

Achromatopsia (no color)

#7F7F7F

Design tokens & code

CSS

--color: #3f81cf;
/* rgb */ color: rgb(63, 129, 207);
/* oklch */ color: oklch(59.8% 0.137 254.2);

Tailwind

colors: {
  custom: {
    50: '#84a5de',
    500: '#3f81cf',
    950: '#000000',
  },
}

SCSS

$custom: #3f81cf;
$custom-light: #84a5de;
$custom-dark: #000000;

JSON

{
  "hex": "#3f81cf",
  "rgb": {
    "r": 63,
    "g": 129,
    "b": 207
  },
  "hsl": {
    "h": 212.5,
    "s": 60,
    "l": 52.941
  },
  "oklch": {
    "l": 0.59762,
    "c": 0.13727,
    "h": 254.2
  },
  "luminance": 0.21262
}

Semantic roles & 50–950 ramp

primary

#3F81CF

secondary

#D4B796

accent

#9B45E3

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C0F15

muted

#7D7F83

Preview Lab

Preview with #3F81CF

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

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