#3970C5#3970C5

#3970C5 is a mid, vivid blue. Relative luminance 0.165; OKLCH L 55.1% C 0.145 H 258.9°. Best body text is #FFFFFF at 4.89:1 contrast (WCAG AA passes).

Color values

HEX	#3970C5
RGB	rgb(57, 112, 197)
HSL	hsl(216, 55%, 50%)
HSV	hsv(216, 71%, 77%)
CMYK	cmyk(71.1%, 43.1%, 0%, 22.7%)
CIE-LAB	lab(47.61, 10.58, -49.68)
CIE-LCH	lch(47.61, 50.79, 282.02°)
OKLab	oklab(55.15% -0.0278 -0.142)
OKLCH	oklch(55.15% 0.145 258.9)
XYZ	xyz(17.5559, 16.4875, 55.0697)
Luminance	0.1649 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3970C5 #C58E39

analogous

#39B6C5 #3970C5 #4839C5

triadic

#3970C5 #C53970 #70C539

tetradic

#3970C5 #C539B6 #C58E39 #39C548

square

#3970C5 #C539B6 #C58E39 #39C548

split-complementary

#3970C5 #C54839 #B6C539

monochromatic

#1E3A66 #2B5596 #3970C5 #6892D3 #97B4E1

Accessibility & contrast

On white

4.89

#3970C5 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.30

#3970C5 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3970C5

4.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3970C5	#FFFFFF	#000000	##FFFFFF
##3970C5	1.00	4.89	4.30	4.89
#FFFFFF	4.89	1.00	21.00	1.00
#000000	4.30	21.00	1.00	21.00
##FFFFFF	4.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4778C8

Deuteranopia (green-blind)

#2E6BC3

Tritanopia (blue-blind)

#008491

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #3970c5;
/* rgb */ color: rgb(57, 112, 197);
/* oklch */ color: oklch(55.1% 0.145 258.9);

Tailwind

colors: {
  custom: {
    50: '#8098d7',
    500: '#3970c5',
    950: '#000000',
  },
}

SCSS

$custom: #3970c5;
$custom-light: #8098d7;
$custom-dark: #000000;

JSON

{
  "hex": "#3970c5",
  "rgb": {
    "r": 57,
    "g": 112,
    "b": 197
  },
  "hsl": {
    "h": 216.429,
    "s": 55.118,
    "l": 49.804
  },
  "oklch": {
    "l": 0.55149,
    "c": 0.14474,
    "h": 258.9
  },
  "luminance": 0.16489
}

Semantic roles & 50–950 ramp

primary

#3970C5

secondary

#CDB48D

accent

#A449DE

background

#F8F9FD

surface

#F0F2FA

border

#CBCCD3

text

#0B0D14

muted

#7C7E83

Preview Lab

Preview with #3970C5

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

Preview Lab → · Contrast checker → · Palette generator →