#3758CF#3758CF

#3758CF is a mid, vivid blue. Relative luminance 0.123; OKLCH L 50.8% C 0.188 H 267.4°. Best body text is #FFFFFF at 6.07:1 contrast (WCAG AA passes).

Color values

HEX	#3758CF
RGB	rgb(55, 88, 207)
HSL	hsl(227, 61%, 51%)
HSV	hsv(227, 73%, 81%)
CMYK	cmyk(73.4%, 57.5%, 0%, 18.8%)
CIE-LAB	lab(41.68, 29.30, -65.00)
CIE-LCH	lch(41.68, 71.30, 294.27°)
OKLab	oklab(50.83% -0.0085 -0.1875)
OKLCH	oklch(50.83% 0.188 267.4)
XYZ	xyz(16.3238, 12.2949, 60.5322)
Luminance	0.1230 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3758CF #CFAE37

analogous

#37A4CF #3758CF #6237CF

triadic

#3758CF #CF3758 #58CF37

tetradic

#3758CF #CF37A4 #CFAE37 #37CF62

square

#3758CF #CF37A4 #CFAE37 #37CF62

split-complementary

#3758CF #CF6237 #A4CF37

monochromatic

#1B2E71 #2742A2 #3758CF #6881DB #9AAAE7

Accessibility & contrast

On white

6.07

#3758CF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.46

#3758CF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3758CF

6.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3758CF	#FFFFFF	#000000	##FFFFFF
##3758CF	1.00	6.07	3.46	6.07
#FFFFFF	6.07	1.00	21.00	1.00
#000000	3.46	21.00	1.00	21.00
##FFFFFF	6.07	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#006AD3

Deuteranopia (green-blind)

#005CCD

Tritanopia (blue-blind)

#00768B

Achromatopsia (no color)

#626262

Design tokens & code

CSS

--color: #3758cf;
/* rgb */ color: rgb(55, 88, 207);
/* oklch */ color: oklch(50.8% 0.188 267.4);

Tailwind

colors: {
  custom: {
    50: '#8286df',
    500: '#3758cf',
    950: '#000000',
  },
}

SCSS

$custom: #3758cf;
$custom-light: #8286df;
$custom-dark: #000000;

JSON

{
  "hex": "#3758cf",
  "rgb": {
    "r": 55,
    "g": 88,
    "b": 207
  },
  "hsl": {
    "h": 226.974,
    "s": 61.29,
    "l": 51.373
  },
  "oklch": {
    "l": 0.50827,
    "c": 0.18772,
    "h": 267.4
  },
  "luminance": 0.12297
}

Semantic roles & 50–950 ramp

primary

#3758CF

secondary

#D2C48F

accent

#C143E4

background

#F8F8FD

surface

#F0EFFB

border

#CBCAD4

text

#0C0B15

muted

#7D7C83

Preview Lab

Preview with #3758CF

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

Preview Lab → · Contrast checker → · Palette generator →