#3974D0#3974D0

#3974D0 is a mid, vivid blue. Relative luminance 0.179; OKLCH L 56.7% C 0.155 H 259.1°. Best body text is #000000 at 4.58:1 contrast (WCAG AA passes).

Color values

HEX	#3974D0
RGB	rgb(57, 116, 208)
HSL	hsl(217, 62%, 52%)
HSV	hsv(217, 73%, 82%)
CMYK	cmyk(72.6%, 44.2%, 0%, 18.4%)
CIE-LAB	lab(49.39, 12.10, -53.12)
CIE-LCH	lch(49.39, 54.48, 282.83°)
OKLab	oklab(56.74% -0.0294 -0.1521)
OKLCH	oklch(56.74% 0.155 259.1)
XYZ	xyz(19.3138, 17.9126, 62.1019)
Luminance	0.1792 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3974D0 #D09539

analogous

#39C0D0 #3974D0 #4939D0

triadic

#3974D0 #D03974 #74D039

tetradic

#3974D0 #D039C0 #D09539 #39D049

square

#3974D0 #D039C0 #D09539 #39D049

split-complementary

#3974D0 #D04939 #C0D039

monochromatic

#1B3E73 #2758A5 #3974D0 #6A97DC #9CB9E7

Accessibility & contrast

On white

4.58

#3974D0 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.58

#3974D0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3974D0

4.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3974D0	#FFFFFF	#000000	##000000
##3974D0	1.00	4.58	4.58	4.58
#FFFFFF	4.58	1.00	21.00	21.00
#000000	4.58	21.00	1.00	1.00
##000000	4.58	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#467DD4

Deuteranopia (green-blind)

#286FCE

Tritanopia (blue-blind)

#008A98

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #3974d0;
/* rgb */ color: rgb(57, 116, 208);
/* oklch */ color: oklch(56.7% 0.155 259.1);

Tailwind

colors: {
  custom: {
    50: '#829bdf',
    500: '#3974d0',
    950: '#000000',
  },
}

SCSS

$custom: #3974d0;
$custom-light: #829bdf;
$custom-dark: #000000;

JSON

{
  "hex": "#3974d0",
  "rgb": {
    "r": 57,
    "g": 116,
    "b": 208
  },
  "hsl": {
    "h": 216.556,
    "s": 61.633,
    "l": 51.961
  },
  "oklch": {
    "l": 0.56737,
    "c": 0.15489,
    "h": 259.1
  },
  "luminance": 0.17915
}

Semantic roles & 50–950 ramp

primary

#3974D0

secondary

#D3BA91

accent

#A643E5

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3974D0

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

Preview Lab → · Contrast checker → · Palette generator →