#3971CA#3971CA

#3971CA is a mid, vivid blue. Relative luminance 0.169; OKLCH L 55.7% C 0.150 H 259.3°. Best body text is #FFFFFF at 4.78:1 contrast (WCAG AA passes).

Color values

HEX	#3971CA
RGB	rgb(57, 113, 202)
HSL	hsl(217, 58%, 51%)
HSV	hsv(217, 72%, 79%)
CMYK	cmyk(71.8%, 44.1%, 0%, 20.8%)
CIE-LAB	lab(48.19, 11.78, -51.62)
CIE-LCH	lch(48.19, 52.95, 282.86°)
OKLab	oklab(55.69% -0.0278 -0.1477)
OKLCH	oklch(55.69% 0.15 259.3)
XYZ	xyz(18.2493, 16.9424, 58.1741)
Luminance	0.1694 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3971CA #CA9239

analogous

#39B9CA #3971CA #4939CA

triadic

#3971CA #CA3971 #71CA39

tetradic

#3971CA #CA39B9 #CA9239 #39CA49

square

#3971CA #CA39B9 #CA9239 #39CA49

split-complementary

#3971CA #CA4939 #B9CA39

monochromatic

#1D3B6C #2A569C #3971CA #6994D7 #9AB6E4

Accessibility & contrast

On white

4.78

#3971CA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.39

#3971CA on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3971CA

4.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3971CA	#FFFFFF	#000000	##FFFFFF
##3971CA	1.00	4.78	4.39	4.78
#FFFFFF	4.78	1.00	21.00	1.00
#000000	4.39	21.00	1.00	21.00
##FFFFFF	4.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#457ACD

Deuteranopia (green-blind)

#296CC8

Tritanopia (blue-blind)

#008693

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #3971ca;
/* rgb */ color: rgb(57, 113, 202);
/* oklch */ color: oklch(55.7% 0.150 259.3);

Tailwind

colors: {
  custom: {
    50: '#8199db',
    500: '#3971ca',
    950: '#000000',
  },
}

SCSS

$custom: #3971ca;
$custom-light: #8199db;
$custom-dark: #000000;

JSON

{
  "hex": "#3971ca",
  "rgb": {
    "r": 57,
    "g": 113,
    "b": 202
  },
  "hsl": {
    "h": 216.828,
    "s": 57.769,
    "l": 50.784
  },
  "oklch": {
    "l": 0.55693,
    "c": 0.15031,
    "h": 259.3
  },
  "luminance": 0.16944
}

Semantic roles & 50–950 ramp

primary

#3971CA

secondary

#D0B78F

accent

#A547E1

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0D15

muted

#7D7E83

Preview Lab

Preview with #3971CA

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

Preview Lab → · Contrast checker → · Palette generator →