#3975CC#3975CC

#3975CC is a mid, vivid blue. Relative luminance 0.180; OKLCH L 56.7% C 0.148 H 257.9°. Best body text is #000000 at 4.59:1 contrast (WCAG AA passes).

Color values

HEX	#3975CC
RGB	rgb(57, 117, 204)
HSL	hsl(216, 59%, 51%)
HSV	hsv(216, 72%, 80%)
CMYK	cmyk(72.1%, 42.6%, 0%, 20%)
CIE-LAB	lab(49.44, 10.02, -50.77)
CIE-LCH	lch(49.44, 51.75, 281.16°)
OKLab	oklab(56.7% -0.031 -0.1451)
OKLCH	oklch(56.7% 0.148 257.9)
XYZ	xyz(18.9437, 17.9500, 59.5814)
Luminance	0.1795 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3975CC #CC9039

analogous

#39BECC #3975CC #4639CC

triadic

#3975CC #CC3975 #75CC39

tetradic

#3975CC #CC39BE #CC9039 #39CC46

square

#3975CC #CC39BE #CC9039 #39CC46

split-complementary

#3975CC #CC4639 #BECC39

monochromatic

#1C3E6E #29599F #3975CC #6A97D9 #9AB9E5

Accessibility & contrast

On white

4.57

#3975CC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.59

#3975CC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3975CC

4.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3975CC	#FFFFFF	#000000	##000000
##3975CC	1.00	4.57	4.59	4.59
#FFFFFF	4.57	1.00	21.00	21.00
#000000	4.59	21.00	1.00	1.00
##000000	4.59	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4B7DCF

Deuteranopia (green-blind)

#316FCA

Tritanopia (blue-blind)

#008996

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #3975cc;
/* rgb */ color: rgb(57, 117, 204);
/* oklch */ color: oklch(56.7% 0.148 257.9);

Tailwind

colors: {
  custom: {
    50: '#819cdc',
    500: '#3975cc',
    950: '#000000',
  },
}

SCSS

$custom: #3975cc;
$custom-light: #819cdc;
$custom-dark: #000000;

JSON

{
  "hex": "#3975cc",
  "rgb": {
    "r": 57,
    "g": 117,
    "b": 204
  },
  "hsl": {
    "h": 215.51,
    "s": 59.036,
    "l": 51.176
  },
  "oklch": {
    "l": 0.56696,
    "c": 0.14843,
    "h": 257.9
  },
  "luminance": 0.17952
}

Semantic roles & 50–950 ramp

primary

#3975CC

secondary

#D1B690

accent

#A246E2

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3975CC

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

Preview Lab → · Contrast checker → · Palette generator →