#3970BE#3970BE

#3970BE is a mid, vivid blue. Relative luminance 0.162; OKLCH L 54.7% C 0.135 H 257.5°. Best body text is #FFFFFF at 4.96:1 contrast (WCAG AA passes).

Color values

HEX	#3970BE
RGB	rgb(57, 112, 190)
HSL	hsl(215, 54%, 48%)
HSV	hsv(215, 70%, 75%)
CMYK	cmyk(70%, 41.1%, 0%, 25.5%)
CIE-LAB	lab(47.20, 8.03, -46.30)
CIE-LCH	lch(47.20, 46.99, 279.84°)
OKLab	oklab(54.7% -0.0293 -0.1321)
OKLCH	oklch(54.7% 0.135 257.5)
XYZ	xyz(16.7724, 16.1741, 50.9432)
Luminance	0.1618 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3970BE #BE8739

analogous

#39B2BE #3970BE #4439BE

triadic

#3970BE #BE3970 #70BE39

tetradic

#3970BE #BE39B2 #BE8739 #39BE44

square

#3970BE #BE39B2 #BE8739 #39BE44

split-complementary

#3970BE #BE4439 #B2BE39

monochromatic

#1D3860 #2B548F #3970BE #6491D0 #93B2DF

Accessibility & contrast

On white

4.96

#3970BE on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.24

#3970BE on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3970BE

4.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3970BE	#FFFFFF	#000000	##FFFFFF
##3970BE	1.00	4.96	4.24	4.96
#FFFFFF	4.96	1.00	21.00	1.00
#000000	4.24	21.00	1.00	21.00
##FFFFFF	4.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4B77C1

Deuteranopia (green-blind)

#366ABC

Tritanopia (blue-blind)

#00828E

Achromatopsia (no color)

#707070

Design tokens & code

CSS

--color: #3970be;
/* rgb */ color: rgb(57, 112, 190);
/* oklch */ color: oklch(54.7% 0.135 257.5);

Tailwind

colors: {
  custom: {
    50: '#7f98d2',
    500: '#3970be',
    950: '#000000',
  },
}

SCSS

$custom: #3970be;
$custom-light: #7f98d2;
$custom-dark: #000000;

JSON

{
  "hex": "#3970be",
  "rgb": {
    "r": 57,
    "g": 112,
    "b": 190
  },
  "hsl": {
    "h": 215.188,
    "s": 53.846,
    "l": 48.431
  },
  "oklch": {
    "l": 0.54703,
    "c": 0.13531,
    "h": 257.5
  },
  "luminance": 0.16176
}

Semantic roles & 50–950 ramp

primary

#3970BE

secondary

#CAAF89

accent

#A14BDD

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0D14

muted

#7C7E82

Preview Lab

Preview with #3970BE

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

Preview Lab → · Contrast checker → · Palette generator →