#3971DA#3971DA

#3971DA is a mid, vivid blue. Relative luminance 0.177; OKLCH L 56.8% C 0.172 H 261.6°. Best body text is #FFFFFF at 4.62:1 contrast (WCAG AA passes).

Color values

HEX	#3971DA
RGB	rgb(57, 113, 218)
HSL	hsl(219, 69%, 54%)
HSV	hsv(219, 74%, 85%)
CMYK	cmyk(73.9%, 48.2%, 0%, 14.5%)
CIE-LAB	lab(49.18, 17.65, -59.14)
CIE-LCH	lch(49.18, 61.72, 286.62°)
OKLab	oklab(56.77% -0.0252 -0.1698)
OKLCH	oklch(56.77% 0.172 261.6)
XYZ	xyz(20.2428, 17.7398, 68.6733)
Luminance	0.1774 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3971DA #DAA239

analogous

#39C2DA #3971DA #5239DA

triadic

#3971DA #DA3971 #71DA39

tetradic

#3971DA #DA39C2 #DAA239 #39DA52

square

#3971DA #DA39C2 #DAA239 #39DA52

split-complementary

#3971DA #DA5239 #C2DA39

monochromatic

#183C81 #2255B4 #3971DA #6D96E4 #A0BBED

Accessibility & contrast

On white

4.62

#3971DA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.55

#3971DA on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #3971DA

4.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3971DA	#FFFFFF	#000000	##FFFFFF
##3971DA	1.00	4.62	4.55	4.62
#FFFFFF	4.62	1.00	21.00	1.00
#000000	4.55	21.00	1.00	21.00
##FFFFFF	4.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#367DDE

Deuteranopia (green-blind)

#006ED8

Tritanopia (blue-blind)

#008A9B

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #3971da;
/* rgb */ color: rgb(57, 113, 218);
/* oklch */ color: oklch(56.8% 0.172 261.6);

Tailwind

colors: {
  custom: {
    50: '#8499e6',
    500: '#3971da',
    950: '#000000',
  },
}

SCSS

$custom: #3971da;
$custom-light: #8499e6;
$custom-dark: #000000;

JSON

{
  "hex": "#3971da",
  "rgb": {
    "r": 57,
    "g": 113,
    "b": 218
  },
  "hsl": {
    "h": 219.13,
    "s": 68.511,
    "l": 53.922
  },
  "oklch": {
    "l": 0.56774,
    "c": 0.1717,
    "h": 261.6
  },
  "luminance": 0.17742
}

Semantic roles & 50–950 ramp

primary

#3971DA

secondary

#DAC295

accent

#AF3CEB

background

#F8F9FE

surface

#F0F2FC

border

#CBCCD5

text

#0C0D16

muted

#7D7E84

Preview Lab

Preview with #3971DA

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

Preview Lab → · Contrast checker → · Palette generator →