#3F77BD#3F77BD

#3F77BD is a mid, vivid cyan. Relative luminance 0.179; OKLCH L 56.5% C 0.124 H 255.1°. Best body text is #000000 at 4.59:1 contrast (WCAG AA passes).

Color values

HEX	#3F77BD
RGB	rgb(63, 119, 189)
HSL	hsl(213, 50%, 49%)
HSV	hsv(213, 67%, 74%)
CMYK	cmyk(66.7%, 37%, 0%, 25.9%)
CIE-LAB	lab(49.40, 4.31, -42.21)
CIE-LCH	lch(49.40, 42.43, 275.83°)
OKLab	oklab(56.46% -0.0319 -0.1199)
OKLCH	oklch(56.46% 0.124 255.1)
XYZ	xyz(17.8287, 17.9227, 50.6541)
Luminance	0.1792 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F77BD #BD853F

analogous

#3FB6BD #3F77BD #463FBD

triadic

#3F77BD #BD3F77 #77BD3F

tetradic

#3F77BD #BD3FB6 #BD853F #3FBD46

square

#3F77BD #BD3FB6 #BD853F #3FBD46

split-complementary

#3F77BD #BD463F #B6BD3F

monochromatic

#203D61 #305A8F #3F77BD #6B97CE #99B7DD

Accessibility & contrast

On white

4.58

#3F77BD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.59

#3F77BD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F77BD

4.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F77BD	#FFFFFF	#000000	##000000
##3F77BD	1.00	4.58	4.59	4.59
#FFFFFF	4.58	1.00	21.00	21.00
#000000	4.59	21.00	1.00	1.00
##000000	4.59	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#587CC0

Deuteranopia (green-blind)

#4670BC

Tritanopia (blue-blind)

#008791

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #3f77bd;
/* rgb */ color: rgb(63, 119, 189);
/* oklch */ color: oklch(56.5% 0.124 255.1);

Tailwind

colors: {
  custom: {
    50: '#819dd1',
    500: '#3f77bd',
    950: '#000000',
  },
}

SCSS

$custom: #3f77bd;
$custom-light: #819dd1;
$custom-dark: #000000;

JSON

{
  "hex": "#3f77bd",
  "rgb": {
    "r": 63,
    "g": 119,
    "b": 189
  },
  "hsl": {
    "h": 213.333,
    "s": 50,
    "l": 49.412
  },
  "oklch": {
    "l": 0.56463,
    "c": 0.12411,
    "h": 255.1
  },
  "luminance": 0.17925
}

Semantic roles & 50–950 ramp

primary

#3F77BD

secondary

#C9AF8F

accent

#9C4EDA

background

#F8F9FC

surface

#F0F2F9

border

#CBCCD2

text

#0B0E14

muted

#7C7E82

Preview Lab

Preview with #3F77BD

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

Preview Lab → · Contrast checker → · Palette generator →