#3F74BD#3F74BD

#3F74BD is a mid, vivid cyan. Relative luminance 0.172; OKLCH L 55.8% C 0.127 H 256.9°. Best body text is #FFFFFF at 4.73:1 contrast (WCAG AA passes).

Color values

HEX	#3F74BD
RGB	rgb(63, 116, 189)
HSL	hsl(215, 50%, 49%)
HSV	hsv(215, 67%, 74%)
CMYK	cmyk(66.7%, 38.6%, 0%, 25.9%)
CIE-LAB	lab(48.54, 6.15, -43.58)
CIE-LCH	lch(48.54, 44.01, 278.04°)
OKLab	oklab(55.79% -0.0289 -0.124)
OKLCH	oklch(55.79% 0.127 256.9)
XYZ	xyz(17.4773, 17.2199, 50.5370)
Luminance	0.1722 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F74BD #BD883F

analogous

#3FB3BD #3F74BD #493FBD

triadic

#3F74BD #BD3F74 #74BD3F

tetradic

#3F74BD #BD3FB3 #BD883F #3FBD49

square

#3F74BD #BD3FB3 #BD883F #3FBD49

split-complementary

#3F74BD #BD493F #B3BD3F

monochromatic

#203C61 #30588F #3F74BD #6B95CE #99B6DD

Accessibility & contrast

On white

4.73

#3F74BD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.44

#3F74BD on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F74BD

4.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F74BD	#FFFFFF	#000000	##FFFFFF
##3F74BD	1.00	4.73	4.44	4.73
#FFFFFF	4.73	1.00	21.00	1.00
#000000	4.44	21.00	1.00	21.00
##FFFFFF	4.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#537AC0

Deuteranopia (green-blind)

#416EBC

Tritanopia (blue-blind)

#00858F

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #3f74bd;
/* rgb */ color: rgb(63, 116, 189);
/* oklch */ color: oklch(55.8% 0.127 256.9);

Tailwind

colors: {
  custom: {
    50: '#819bd1',
    500: '#3f74bd',
    950: '#000000',
  },
}

SCSS

$custom: #3f74bd;
$custom-light: #819bd1;
$custom-dark: #000000;

JSON

{
  "hex": "#3f74bd",
  "rgb": {
    "r": 63,
    "g": 116,
    "b": 189
  },
  "hsl": {
    "h": 214.762,
    "s": 50,
    "l": 49.412
  },
  "oklch": {
    "l": 0.55788,
    "c": 0.12731,
    "h": 256.9
  },
  "luminance": 0.17222
}

Semantic roles & 50–950 ramp

primary

#3F74BD

secondary

#C9B18F

accent

#9F4EDA

background

#F8F9FC

surface

#F0F2F9

border

#CBCCD2

text

#0B0E14

muted

#7C7E82

Preview Lab

Preview with #3F74BD

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

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