#3970C9#3970C9

#3970C9 is a mid, vivid blue. Relative luminance 0.167; OKLCH L 55.4% C 0.150 H 259.6°. Best body text is #FFFFFF at 4.84:1 contrast (WCAG AA passes).

Color values

HEX	#3970C9
RGB	rgb(57, 112, 201)
HSL	hsl(217, 57%, 51%)
HSV	hsv(217, 72%, 79%)
CMYK	cmyk(71.6%, 44.3%, 0%, 21.2%)
CIE-LAB	lab(47.85, 12.04, -51.59)
CIE-LCH	lch(47.85, 52.98, 283.14°)
OKLab	oklab(55.41% -0.0271 -0.1477)
OKLCH	oklch(55.41% 0.15 259.6)
XYZ	xyz(18.0203, 16.6733, 57.5156)
Luminance	0.1668 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3970C9 #C99239

analogous

#39B8C9 #3970C9 #4A39C9

triadic

#3970C9 #C93970 #70C939

tetradic

#3970C9 #C939B8 #C99239 #39C94A

square

#3970C9 #C939B8 #C99239 #39C94A

split-complementary

#3970C9 #C94A39 #B8C939

monochromatic

#1D3B6B #2A559B #3970C9 #6993D6 #99B5E3

Accessibility & contrast

On white

4.84

#3970C9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.34

#3970C9 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3970C9

4.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3970C9	#FFFFFF	#000000	##FFFFFF
##3970C9	1.00	4.84	4.34	4.84
#FFFFFF	4.84	1.00	21.00	1.00
#000000	4.34	21.00	1.00	21.00
##FFFFFF	4.84	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4479CC

Deuteranopia (green-blind)

#286BC7

Tritanopia (blue-blind)

#008593

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #3970c9;
/* rgb */ color: rgb(57, 112, 201);
/* oklch */ color: oklch(55.4% 0.150 259.6);

Tailwind

colors: {
  custom: {
    50: '#8198da',
    500: '#3970c9',
    950: '#000000',
  },
}

SCSS

$custom: #3970c9;
$custom-light: #8198da;
$custom-dark: #000000;

JSON

{
  "hex": "#3970c9",
  "rgb": {
    "r": 57,
    "g": 112,
    "b": 201
  },
  "hsl": {
    "h": 217.083,
    "s": 57.143,
    "l": 50.588
  },
  "oklch": {
    "l": 0.5541,
    "c": 0.15014,
    "h": 259.6
  },
  "luminance": 0.16675
}

Semantic roles & 50–950 ramp

primary

#3970C9

secondary

#CFB68F

accent

#A647E0

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0D15

muted

#7D7E83

Preview Lab

Preview with #3970C9

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

Preview Lab → · Contrast checker → · Palette generator →