#3977DA#3977DA

#3977DA is a mid, vivid blue. Relative luminance 0.191; OKLCH L 58.0% C 0.165 H 259.4°. Best body text is #000000 at 4.83:1 contrast (WCAG AA passes).

Color values

HEX	#3977DA
RGB	rgb(57, 119, 218)
HSL	hsl(217, 69%, 54%)
HSV	hsv(217, 74%, 85%)
CMYK	cmyk(73.9%, 45.4%, 0%, 14.5%)
CIE-LAB	lab(50.83, 13.89, -56.48)
CIE-LCH	lch(50.83, 58.17, 283.82°)
OKLab	oklab(58.04% -0.0302 -0.1619)
OKLCH	oklch(58.04% 0.165 259.4)
XYZ	xyz(20.9345, 19.1231, 68.9039)
Luminance	0.1913 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3977DA #DA9C39

analogous

#39C8DA #3977DA #4C39DA

triadic

#3977DA #DA3977 #77DA39

tetradic

#3977DA #DA39C8 #DA9C39 #39DA4C

square

#3977DA #DA39C8 #DA9C39 #39DA4C

split-complementary

#3977DA #DA4C39 #C8DA39

monochromatic

#184081 #225AB4 #3977DA #6D9AE4 #A0BEED

Accessibility & contrast

On white

4.35

#3977DA on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.83

#3977DA on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3977DA

4.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3977DA	#FFFFFF	#000000	##000000
##3977DA	1.00	4.35	4.83	4.83
#FFFFFF	4.35	1.00	21.00	21.00
#000000	4.83	21.00	1.00	1.00
##000000	4.83	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4381DE

Deuteranopia (green-blind)

#1F72D8

Tritanopia (blue-blind)

#008E9E

Achromatopsia (no color)

#797979

Design tokens & code

CSS

--color: #3977da;
/* rgb */ color: rgb(57, 119, 218);
/* oklch */ color: oklch(58.0% 0.165 259.4);

Tailwind

colors: {
  custom: {
    50: '#849de6',
    500: '#3977da',
    950: '#000000',
  },
}

SCSS

$custom: #3977da;
$custom-light: #849de6;
$custom-dark: #000000;

JSON

{
  "hex": "#3977da",
  "rgb": {
    "r": 57,
    "g": 119,
    "b": 218
  },
  "hsl": {
    "h": 216.894,
    "s": 68.511,
    "l": 53.922
  },
  "oklch": {
    "l": 0.58043,
    "c": 0.16471,
    "h": 259.4
  },
  "luminance": 0.19125
}

Semantic roles & 50–950 ramp

primary

#3977DA

secondary

#DABF95

accent

#A83CEB

background

#F8F9FE

surface

#F0F2FC

border

#CBCCD5

text

#0C0E16

muted

#7D7E84

Preview Lab

Preview with #3977DA

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

Preview Lab → · Contrast checker → · Palette generator →