#3975D7#3975D7

#3975D7 is a mid, vivid blue. Relative luminance 0.185; OKLCH L 57.4% C 0.163 H 259.8°. Best body text is #000000 at 4.70:1 contrast (WCAG AA passes).

Color values

HEX	#3975D7
RGB	rgb(57, 117, 215)
HSL	hsl(217, 66%, 53%)
HSV	hsv(217, 73%, 84%)
CMYK	cmyk(73.5%, 45.6%, 0%, 15.7%)
CIE-LAB	lab(50.09, 14.04, -55.97)
CIE-LCH	lch(50.09, 57.70, 284.08°)
OKLab	oklab(57.42% -0.029 -0.1604)
OKLCH	oklch(57.42% 0.163 259.8)
XYZ	xyz(20.3099, 18.4965, 66.7766)
Luminance	0.1850 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3975D7 #D79B39

analogous

#39C4D7 #3975D7 #4C39D7

triadic

#3975D7 #D73975 #75D739

tetradic

#3975D7 #D739C4 #D79B39 #39D74C

square

#3975D7 #D739C4 #D79B39 #39D74C

split-complementary

#3975D7 #D74C39 #C4D739

monochromatic

#193F7C #2359AF #3975D7 #6C98E1 #9FBCEC

Accessibility & contrast

On white

4.47

#3975D7 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.70

#3975D7 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3975D7

4.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3975D7	#FFFFFF	#000000	##000000
##3975D7	1.00	4.47	4.70	4.70
#FFFFFF	4.47	1.00	21.00	21.00
#000000	4.70	21.00	1.00	1.00
##000000	4.70	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#427FDB

Deuteranopia (green-blind)

#1E70D5

Tritanopia (blue-blind)

#008C9B

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #3975d7;
/* rgb */ color: rgb(57, 117, 215);
/* oklch */ color: oklch(57.4% 0.163 259.8);

Tailwind

colors: {
  custom: {
    50: '#849ce4',
    500: '#3975d7',
    950: '#000000',
  },
}

SCSS

$custom: #3975d7;
$custom-light: #849ce4;
$custom-dark: #000000;

JSON

{
  "hex": "#3975d7",
  "rgb": {
    "r": 57,
    "g": 117,
    "b": 215
  },
  "hsl": {
    "h": 217.215,
    "s": 66.387,
    "l": 53.333
  },
  "oklch": {
    "l": 0.57416,
    "c": 0.16305,
    "h": 259.8
  },
  "luminance": 0.18499
}

Semantic roles & 50–950 ramp

primary

#3975D7

secondary

#D8BE94

accent

#A83EE9

background

#F8F9FE

surface

#F0F2FC

border

#CBCCD5

text

#0C0E16

muted

#7D7E84

Preview Lab

Preview with #3975D7

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

Preview Lab → · Contrast checker → · Palette generator →