#3971C1#3971C1

#3971C1 is a mid, vivid blue. Relative luminance 0.165; OKLCH L 55.1% C 0.138 H 257.6°. Best body text is #FFFFFF at 4.88:1 contrast (WCAG AA passes).

Color values

HEX	#3971C1
RGB	rgb(57, 113, 193)
HSL	hsl(215, 54%, 49%)
HSV	hsv(215, 70%, 76%)
CMYK	cmyk(70.5%, 41.5%, 0%, 24.3%)
CIE-LAB	lab(47.66, 8.50, -47.29)
CIE-LCH	lch(47.66, 48.05, 280.18°)
OKLab	oklab(55.11% -0.0296 -0.135)
OKLCH	oklch(55.11% 0.138 257.6)
XYZ	xyz(17.2146, 16.5285, 52.7248)
Luminance	0.1653 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3971C1 #C18939

analogous

#39B5C1 #3971C1 #4539C1

triadic

#3971C1 #C13971 #71C139

tetradic

#3971C1 #C139B5 #C18939 #39C145

square

#3971C1 #C139B5 #C18939 #39C145

split-complementary

#3971C1 #C14539 #B5C139

monochromatic

#1D3A63 #2B5592 #3971C1 #6692D2 #95B4E0

Accessibility & contrast

On white

4.88

#3971C1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.31

#3971C1 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3971C1

4.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3971C1	#FFFFFF	#000000	##FFFFFF
##3971C1	1.00	4.88	4.31	4.88
#FFFFFF	4.88	1.00	21.00	1.00
#000000	4.31	21.00	1.00	21.00
##FFFFFF	4.88	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4B78C4

Deuteranopia (green-blind)

#356BBF

Tritanopia (blue-blind)

#00848F

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #3971c1;
/* rgb */ color: rgb(57, 113, 193);
/* oklch */ color: oklch(55.1% 0.138 257.6);

Tailwind

colors: {
  custom: {
    50: '#7f99d4',
    500: '#3971c1',
    950: '#000000',
  },
}

SCSS

$custom: #3971c1;
$custom-light: #7f99d4;
$custom-dark: #000000;

JSON

{
  "hex": "#3971c1",
  "rgb": {
    "r": 57,
    "g": 113,
    "b": 193
  },
  "hsl": {
    "h": 215.294,
    "s": 54.4,
    "l": 49.02
  },
  "oklch": {
    "l": 0.55114,
    "c": 0.13823,
    "h": 257.6
  },
  "luminance": 0.1653
}

Semantic roles & 50–950 ramp

primary

#3971C1

secondary

#CBB18B

accent

#A14ADE

background

#F8F9FD

surface

#EFF2FA

border

#CACCD3

text

#0B0D14

muted

#7C7E83

Preview Lab

Preview with #3971C1

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

Preview Lab → · Contrast checker → · Palette generator →