#3F74BC#3F74BC

#3F74BC is a mid, vivid cyan. Relative luminance 0.172; OKLCH L 55.7% C 0.126 H 256.6°. Best body text is #FFFFFF at 4.73:1 contrast (WCAG AA passes).

Color values

HEX	#3F74BC
RGB	rgb(63, 116, 188)
HSL	hsl(215, 50%, 49%)
HSV	hsv(215, 66%, 74%)
CMYK	cmyk(66.5%, 38.3%, 0%, 26.3%)
CIE-LAB	lab(48.48, 5.80, -43.09)
CIE-LCH	lch(48.48, 43.48, 277.66°)
OKLab	oklab(55.73% -0.0291 -0.1225)
OKLCH	oklch(55.73% 0.126 256.6)
XYZ	xyz(17.3691, 17.1767, 49.9673)
Luminance	0.1718 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F74BC #BC873F

analogous

#3FB3BC #3F74BC #493FBC

triadic

#3F74BC #BC3F74 #74BC3F

tetradic

#3F74BC #BC3FB3 #BC873F #3FBC49

square

#3F74BC #BC3FB3 #BC873F #3FBC49

split-complementary

#3F74BC #BC493F #B3BC3F

monochromatic

#203B60 #30588E #3F74BC #6B95CD #99B6DD

Accessibility & contrast

On white

4.73

#3F74BC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.44

#3F74BC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F74BC

4.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F74BC	#FFFFFF	#000000	##FFFFFF
##3F74BC	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)

#547ABF

Deuteranopia (green-blind)

#426EBB

Tritanopia (blue-blind)

#00858F

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #3f74bc;
/* rgb */ color: rgb(63, 116, 188);
/* oklch */ color: oklch(55.7% 0.126 256.6);

Tailwind

colors: {
  custom: {
    50: '#819bd0',
    500: '#3f74bc',
    950: '#000000',
  },
}

SCSS

$custom: #3f74bc;
$custom-light: #819bd0;
$custom-dark: #000000;

JSON

{
  "hex": "#3f74bc",
  "rgb": {
    "r": 63,
    "g": 116,
    "b": 188
  },
  "hsl": {
    "h": 214.56,
    "s": 49.801,
    "l": 49.216
  },
  "oklch": {
    "l": 0.55728,
    "c": 0.12596,
    "h": 256.6
  },
  "luminance": 0.17178
}

Semantic roles & 50–950 ramp

primary

#3F74BC

secondary

#C9B08E

accent

#9E4ED9

background

#F8F9FC

surface

#F0F2F9

border

#CBCCD2

text

#0B0E14

muted

#7C7E82

Preview Lab

Preview with #3F74BC

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

Preview Lab → · Contrast checker → · Palette generator →