#3F74BA#3F74BA

#3F74BA is a mid, vivid cyan. Relative luminance 0.171; OKLCH L 55.6% C 0.123 H 256.1°. Best body text is #FFFFFF at 4.75:1 contrast (WCAG AA passes).

Color values

HEX	#3F74BA
RGB	rgb(63, 116, 186)
HSL	hsl(214, 49%, 49%)
HSV	hsv(214, 66%, 73%)
CMYK	cmyk(66.1%, 37.6%, 0%, 27.1%)
CIE-LAB	lab(48.37, 5.09, -42.11)
CIE-LCH	lch(48.37, 42.41, 276.89°)
OKLab	oklab(55.61% -0.0296 -0.1197)
OKLCH	oklch(55.61% 0.123 256.1)
XYZ	xyz(17.1550, 17.0910, 48.8397)
Luminance	0.1709 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F74BA #BA853F

analogous

#3FB2BA #3F74BA #473FBA

triadic

#3F74BA #BA3F74 #74BA3F

tetradic

#3F74BA #BA3FB2 #BA853F #3FBA47

square

#3F74BA #BA3FB2 #BA853F #3FBA47

split-complementary

#3F74BA #BA473F #B2BA3F

monochromatic

#203B5F #30578C #3F74BA #6A94CC #97B5DC

Accessibility & contrast

On white

4.75

#3F74BA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.42

#3F74BA on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F74BA

4.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F74BA	#FFFFFF	#000000	##FFFFFF
##3F74BA	1.00	4.75	4.42	4.75
#FFFFFF	4.75	1.00	21.00	1.00
#000000	4.42	21.00	1.00	21.00
##FFFFFF	4.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5579BD

Deuteranopia (green-blind)

#436EB9

Tritanopia (blue-blind)

#00848E

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #3f74ba;
/* rgb */ color: rgb(63, 116, 186);
/* oklch */ color: oklch(55.6% 0.123 256.1);

Tailwind

colors: {
  custom: {
    50: '#819bcf',
    500: '#3f74ba',
    950: '#000000',
  },
}

SCSS

$custom: #3f74ba;
$custom-light: #819bcf;
$custom-dark: #000000;

JSON

{
  "hex": "#3f74ba",
  "rgb": {
    "r": 63,
    "g": 116,
    "b": 186
  },
  "hsl": {
    "h": 214.146,
    "s": 49.398,
    "l": 48.824
  },
  "oklch": {
    "l": 0.55609,
    "c": 0.12328,
    "h": 256.1
  },
  "luminance": 0.17093
}

Semantic roles & 50–950 ramp

primary

#3F74BA

secondary

#C8AE8D

accent

#9D4FD9

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0E14

muted

#7C7E82

Preview Lab

Preview with #3F74BA

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

Preview Lab → · Contrast checker → · Palette generator →