#3970D0#3970D0

#3970D0 is a mid, vivid blue. Relative luminance 0.170; OKLCH L 55.9% C 0.160 H 260.7°. Best body text is #FFFFFF at 4.77:1 contrast (WCAG AA passes).

Color values

HEX	#3970D0
RGB	rgb(57, 112, 208)
HSL	hsl(218, 62%, 52%)
HSV	hsv(218, 73%, 82%)
CMYK	cmyk(72.6%, 46.2%, 0%, 18.4%)
CIE-LAB	lab(48.27, 14.61, -54.91)
CIE-LCH	lch(48.27, 56.82, 284.90°)
OKLab	oklab(55.88% -0.0259 -0.1574)
OKLCH	oklch(55.88% 0.16 260.7)
XYZ	xyz(18.8626, 17.0102, 61.9515)
Luminance	0.1701 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3970D0 #D09939

analogous

#39BBD0 #3970D0 #4E39D0

triadic

#3970D0 #D03970 #70D039

tetradic

#3970D0 #D039BB #D09939 #39D04E

square

#3970D0 #D039BB #D09939 #39D04E

split-complementary

#3970D0 #D04E39 #BBD039

monochromatic

#1B3B73 #2755A5 #3970D0 #6A94DC #9CB7E7

Accessibility & contrast

On white

4.77

#3970D0 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.40

#3970D0 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3970D0

4.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3970D0	#FFFFFF	#000000	##FFFFFF
##3970D0	1.00	4.77	4.40	4.77
#FFFFFF	4.77	1.00	21.00	1.00
#000000	4.40	21.00	1.00	21.00
##FFFFFF	4.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3E7AD4

Deuteranopia (green-blind)

#1B6CCE

Tritanopia (blue-blind)

#008796

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #3970d0;
/* rgb */ color: rgb(57, 112, 208);
/* oklch */ color: oklch(55.9% 0.160 260.7);

Tailwind

colors: {
  custom: {
    50: '#8298df',
    500: '#3970d0',
    950: '#000000',
  },
}

SCSS

$custom: #3970d0;
$custom-light: #8298df;
$custom-dark: #000000;

JSON

{
  "hex": "#3970d0",
  "rgb": {
    "r": 57,
    "g": 112,
    "b": 208
  },
  "hsl": {
    "h": 218.146,
    "s": 61.633,
    "l": 51.961
  },
  "oklch": {
    "l": 0.55876,
    "c": 0.15953,
    "h": 260.7
  },
  "luminance": 0.17012
}

Semantic roles & 50–950 ramp

primary

#3970D0

secondary

#D3BB91

accent

#AA43E5

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0D15

muted

#7D7E83

Preview Lab

Preview with #3970D0

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

Preview Lab → · Contrast checker → · Palette generator →