#3971CE#3971CE

#3971CE is a mid, vivid blue. Relative luminance 0.171; OKLCH L 56.0% C 0.156 H 260.0°. Best body text is #FFFFFF at 4.74:1 contrast (WCAG AA passes).

Color values

HEX	#3971CE
RGB	rgb(57, 113, 206)
HSL	hsl(217, 60%, 52%)
HSV	hsv(217, 72%, 81%)
CMYK	cmyk(72.3%, 45.1%, 0%, 19.2%)
CIE-LAB	lab(48.43, 13.25, -53.52)
CIE-LCH	lch(48.43, 55.14, 283.90°)
OKLab	oklab(55.96% -0.0271 -0.1533)
OKLCH	oklch(55.96% 0.156 260)
XYZ	xyz(18.7290, 17.1343, 60.7007)
Luminance	0.1714 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3971CE #CE9639

analogous

#39BBCE #3971CE #4C39CE

triadic

#3971CE #CE3971 #71CE39

tetradic

#3971CE #CE39BB #CE9639 #39CE4C

square

#3971CE #CE39BB #CE9639 #39CE4C

split-complementary

#3971CE #CE4C39 #BBCE39

monochromatic

#1C3C71 #2856A2 #3971CE #6A94DA #9BB7E6

Accessibility & contrast

On white

4.74

#3971CE on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.43

#3971CE on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3971CE

4.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3971CE	#FFFFFF	#000000	##FFFFFF
##3971CE	1.00	4.74	4.43	4.74
#FFFFFF	4.74	1.00	21.00	1.00
#000000	4.43	21.00	1.00	21.00
##FFFFFF	4.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#417AD2

Deuteranopia (green-blind)

#236DCC

Tritanopia (blue-blind)

#008795

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #3971ce;
/* rgb */ color: rgb(57, 113, 206);
/* oklch */ color: oklch(56.0% 0.156 260.0);

Tailwind

colors: {
  custom: {
    50: '#8299dd',
    500: '#3971ce',
    950: '#000000',
  },
}

SCSS

$custom: #3971ce;
$custom-light: #8299dd;
$custom-dark: #000000;

JSON

{
  "hex": "#3971ce",
  "rgb": {
    "r": 57,
    "g": 113,
    "b": 206
  },
  "hsl": {
    "h": 217.45,
    "s": 60.324,
    "l": 51.569
  },
  "oklch": {
    "l": 0.55957,
    "c": 0.15569,
    "h": 260
  },
  "luminance": 0.17136
}

Semantic roles & 50–950 ramp

primary

#3971CE

secondary

#D2BA91

accent

#A844E3

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0D15

muted

#7D7E83

Preview Lab

Preview with #3971CE

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

Preview Lab → · Contrast checker → · Palette generator →