#3F75BA#3F75BA

#3F75BA is a mid, vivid cyan. Relative luminance 0.173; OKLCH L 55.8% C 0.122 H 255.5°. Best body text is #FFFFFF at 4.70:1 contrast (WCAG AA passes).

Color values

HEX	#3F75BA
RGB	rgb(63, 117, 186)
HSL	hsl(214, 49%, 49%)
HSV	hsv(214, 66%, 73%)
CMYK	cmyk(66.1%, 37.1%, 0%, 27.1%)
CIE-LAB	lab(48.66, 4.48, -41.65)
CIE-LCH	lch(48.66, 41.89, 276.13°)
OKLab	oklab(55.84% -0.0306 -0.1183)
OKLCH	oklch(55.84% 0.122 255.5)
XYZ	xyz(17.2709, 17.3228, 48.8783)
Luminance	0.1732 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F75BA #BA843F

analogous

#3FB3BA #3F75BA #473FBA

triadic

#3F75BA #BA3F75 #75BA3F

tetradic

#3F75BA #BA3FB3 #BA843F #3FBA47

square

#3F75BA #BA3FB3 #BA843F #3FBA47

split-complementary

#3F75BA #BA473F #B3BA3F

monochromatic

#203B5F #30588C #3F75BA #6A95CC #97B6DC

Accessibility & contrast

On white

4.70

#3F75BA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.47

#3F75BA on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F75BA

4.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F75BA	#FFFFFF	#000000	##FFFFFF
##3F75BA	1.00	4.70	4.47	4.70
#FFFFFF	4.70	1.00	21.00	1.00
#000000	4.47	21.00	1.00	21.00
##FFFFFF	4.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#577ABD

Deuteranopia (green-blind)

#456EB9

Tritanopia (blue-blind)

#00858E

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #3f75ba;
/* rgb */ color: rgb(63, 117, 186);
/* oklch */ color: oklch(55.8% 0.122 255.5);

Tailwind

colors: {
  custom: {
    50: '#819ccf',
    500: '#3f75ba',
    950: '#000000',
  },
}

SCSS

$custom: #3f75ba;
$custom-light: #819ccf;
$custom-dark: #000000;

JSON

{
  "hex": "#3f75ba",
  "rgb": {
    "r": 63,
    "g": 117,
    "b": 186
  },
  "hsl": {
    "h": 213.659,
    "s": 49.398,
    "l": 48.824
  },
  "oklch": {
    "l": 0.55835,
    "c": 0.12222,
    "h": 255.5
  },
  "luminance": 0.17325
}

Semantic roles & 50–950 ramp

primary

#3F75BA

secondary

#C8AE8D

accent

#9C4FD9

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0E14

muted

#7C7E82

Preview Lab

Preview with #3F75BA

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

Preview Lab → · Contrast checker → · Palette generator →