#3970CC#3970CC

#3970CC is a mid, vivid blue. Relative luminance 0.168; OKLCH L 55.6% C 0.154 H 260.1°. Best body text is #FFFFFF at 4.81:1 contrast (WCAG AA passes).

Color values

HEX	#3970CC
RGB	rgb(57, 112, 204)
HSL	hsl(218, 59%, 51%)
HSV	hsv(218, 72%, 80%)
CMYK	cmyk(72.1%, 45.1%, 0%, 20%)
CIE-LAB	lab(48.03, 13.14, -53.02)
CIE-LCH	lch(48.03, 54.63, 283.92°)
OKLab	oklab(55.61% -0.0266 -0.1519)
OKLCH	oklch(55.61% 0.154 260.1)
XYZ	xyz(18.3767, 16.8158, 59.3923)
Luminance	0.1682 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3970CC #CC9539

analogous

#39B9CC #3970CC #4B39CC

triadic

#3970CC #CC3970 #70CC39

tetradic

#3970CC #CC39B9 #CC9539 #39CC4B

square

#3970CC #CC39B9 #CC9539 #39CC4B

split-complementary

#3970CC #CC4B39 #B9CC39

monochromatic

#1C3B6E #29559F #3970CC #6A93D9 #9AB6E5

Accessibility & contrast

On white

4.81

#3970CC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.36

#3970CC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3970CC

4.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3970CC	#FFFFFF	#000000	##FFFFFF
##3970CC	1.00	4.81	4.36	4.81
#FFFFFF	4.81	1.00	21.00	1.00
#000000	4.36	21.00	1.00	21.00
##FFFFFF	4.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4179CF

Deuteranopia (green-blind)

#236CCA

Tritanopia (blue-blind)

#008694

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #3970cc;
/* rgb */ color: rgb(57, 112, 204);
/* oklch */ color: oklch(55.6% 0.154 260.1);

Tailwind

colors: {
  custom: {
    50: '#8198dc',
    500: '#3970cc',
    950: '#000000',
  },
}

SCSS

$custom: #3970cc;
$custom-light: #8198dc;
$custom-dark: #000000;

JSON

{
  "hex": "#3970cc",
  "rgb": {
    "r": 57,
    "g": 112,
    "b": 204
  },
  "hsl": {
    "h": 217.551,
    "s": 59.036,
    "l": 51.176
  },
  "oklch": {
    "l": 0.55608,
    "c": 0.15417,
    "h": 260.1
  },
  "luminance": 0.16818
}

Semantic roles & 50–950 ramp

primary

#3970CC

secondary

#D1B990

accent

#A846E2

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0D15

muted

#7D7E83

Preview Lab

Preview with #3970CC

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

Preview Lab → · Contrast checker → · Palette generator →