#3970CE#3970CE

#3970CE is a mid, vivid blue. Relative luminance 0.169; OKLCH L 55.7% C 0.157 H 260.4°. Best body text is #FFFFFF at 4.79:1 contrast (WCAG AA passes).

Color values

HEX	#3970CE
RGB	rgb(57, 112, 206)
HSL	hsl(218, 60%, 52%)
HSV	hsv(218, 72%, 81%)
CMYK	cmyk(72.3%, 45.6%, 0%, 19.2%)
CIE-LAB	lab(48.15, 13.88, -53.97)
CIE-LCH	lch(48.15, 55.72, 284.42°)
OKLab	oklab(55.74% -0.0262 -0.1546)
OKLCH	oklch(55.74% 0.157 260.4)
XYZ	xyz(18.6181, 16.9124, 60.6638)
Luminance	0.1691 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3970CE #CE9739

analogous

#39BBCE #3970CE #4D39CE

triadic

#3970CE #CE3970 #70CE39

tetradic

#3970CE #CE39BB #CE9739 #39CE4D

square

#3970CE #CE39BB #CE9739 #39CE4D

split-complementary

#3970CE #CE4D39 #BBCE39

monochromatic

#1C3B71 #2855A2 #3970CE #6A93DA #9BB7E6

Accessibility & contrast

On white

4.79

#3970CE on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.38

#3970CE on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3970CE

4.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3970CE	#FFFFFF	#000000	##FFFFFF
##3970CE	1.00	4.79	4.38	4.79
#FFFFFF	4.79	1.00	21.00	1.00
#000000	4.38	21.00	1.00	21.00
##FFFFFF	4.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3F7AD2

Deuteranopia (green-blind)

#1F6CCC

Tritanopia (blue-blind)

#008695

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #3970ce;
/* rgb */ color: rgb(57, 112, 206);
/* oklch */ color: oklch(55.7% 0.157 260.4);

Tailwind

colors: {
  custom: {
    50: '#8298dd',
    500: '#3970ce',
    950: '#000000',
  },
}

SCSS

$custom: #3970ce;
$custom-light: #8298dd;
$custom-dark: #000000;

JSON

{
  "hex": "#3970ce",
  "rgb": {
    "r": 57,
    "g": 112,
    "b": 206
  },
  "hsl": {
    "h": 217.852,
    "s": 60.324,
    "l": 51.569
  },
  "oklch": {
    "l": 0.55742,
    "c": 0.15686,
    "h": 260.4
  },
  "luminance": 0.16914
}

Semantic roles & 50–950 ramp

primary

#3970CE

secondary

#D2BA91

accent

#A944E3

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0D15

muted

#7D7E83

Preview Lab

Preview with #3970CE

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

Preview Lab → · Contrast checker → · Palette generator →