#3970BD#3970BD

#3970BD is a mid, vivid blue. Relative luminance 0.161; OKLCH L 54.6% C 0.134 H 257.3°. Best body text is #FFFFFF at 4.97:1 contrast (WCAG AA passes).

Color values

HEX	#3970BD
RGB	rgb(57, 112, 189)
HSL	hsl(215, 54%, 48%)
HSV	hsv(215, 70%, 74%)
CMYK	cmyk(69.8%, 40.7%, 0%, 25.9%)
CIE-LAB	lab(47.15, 7.66, -45.81)
CIE-LCH	lch(47.15, 46.44, 279.50°)
OKLab	oklab(54.64% -0.0295 -0.1307)
OKLCH	oklch(54.64% 0.134 257.3)
XYZ	xyz(16.6635, 16.1306, 50.3696)
Luminance	0.1613 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3970BD #BD8639

analogous

#39B2BD #3970BD #4439BD

triadic

#3970BD #BD3970 #70BD39

tetradic

#3970BD #BD39B2 #BD8639 #39BD44

square

#3970BD #BD39B2 #BD8639 #39BD44

split-complementary

#3970BD #BD4439 #B2BD39

monochromatic

#1D385F #2B548E #3970BD #6391D0 #92B2DE

Accessibility & contrast

On white

4.97

#3970BD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.23

#3970BD on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3970BD

4.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3970BD	#FFFFFF	#000000	##FFFFFF
##3970BD	1.00	4.97	4.23	4.97
#FFFFFF	4.97	1.00	21.00	1.00
#000000	4.23	21.00	1.00	21.00
##FFFFFF	4.97	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4C76C0

Deuteranopia (green-blind)

#376ABB

Tritanopia (blue-blind)

#00828D

Achromatopsia (no color)

#707070

Design tokens & code

CSS

--color: #3970bd;
/* rgb */ color: rgb(57, 112, 189);
/* oklch */ color: oklch(54.6% 0.134 257.3);

Tailwind

colors: {
  custom: {
    50: '#7f98d1',
    500: '#3970bd',
    950: '#000000',
  },
}

SCSS

$custom: #3970bd;
$custom-light: #7f98d1;
$custom-dark: #000000;

JSON

{
  "hex": "#3970bd",
  "rgb": {
    "r": 57,
    "g": 112,
    "b": 189
  },
  "hsl": {
    "h": 215,
    "s": 53.659,
    "l": 48.235
  },
  "oklch": {
    "l": 0.54641,
    "c": 0.13396,
    "h": 257.3
  },
  "luminance": 0.16132
}

Semantic roles & 50–950 ramp

primary

#3970BD

secondary

#C9AE89

accent

#A04BDD

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0D14

muted

#7C7E82

Preview Lab

Preview with #3970BD

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

Preview Lab → · Contrast checker → · Palette generator →