#3975D3#3975D3

#3975D3 is a mid, vivid blue. Relative luminance 0.183; OKLCH L 57.1% C 0.158 H 259.2°. Best body text is #000000 at 4.66:1 contrast (WCAG AA passes).

Color values

HEX	#3975D3
RGB	rgb(57, 117, 211)
HSL	hsl(217, 64%, 53%)
HSV	hsv(217, 73%, 83%)
CMYK	cmyk(73%, 44.5%, 0%, 17.3%)
CIE-LAB	lab(49.85, 12.57, -54.09)
CIE-LCH	lch(49.85, 55.53, 283.09°)
OKLab	oklab(57.15% -0.0297 -0.1549)
OKLCH	oklch(57.15% 0.158 259.2)
XYZ	xyz(19.8022, 18.2934, 64.1027)
Luminance	0.1830 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3975D3 #D39739

analogous

#39C2D3 #3975D3 #4A39D3

triadic

#3975D3 #D33975 #75D339

tetradic

#3975D3 #D339C2 #D39739 #39D34A

square

#3975D3 #D339C2 #D39739 #39D34A

split-complementary

#3975D3 #D34A39 #C2D339

monochromatic

#1A3F77 #2659A9 #3975D3 #6B98DE #9DBBE9

Accessibility & contrast

On white

4.51

#3975D3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.66

#3975D3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3975D3

4.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3975D3	#FFFFFF	#000000	##000000
##3975D3	1.00	4.51	4.66	4.66
#FFFFFF	4.51	1.00	21.00	21.00
#000000	4.66	21.00	1.00	1.00
##000000	4.66	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#457ED7

Deuteranopia (green-blind)

#2670D1

Tritanopia (blue-blind)

#008B9A

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #3975d3;
/* rgb */ color: rgb(57, 117, 211);
/* oklch */ color: oklch(57.1% 0.158 259.2);

Tailwind

colors: {
  custom: {
    50: '#839ce1',
    500: '#3975d3',
    950: '#000000',
  },
}

SCSS

$custom: #3975d3;
$custom-light: #839ce1;
$custom-dark: #000000;

JSON

{
  "hex": "#3975d3",
  "rgb": {
    "r": 57,
    "g": 117,
    "b": 211
  },
  "hsl": {
    "h": 216.623,
    "s": 63.636,
    "l": 52.549
  },
  "oklch": {
    "l": 0.5715,
    "c": 0.15774,
    "h": 259.2
  },
  "luminance": 0.18296
}

Semantic roles & 50–950 ramp

primary

#3975D3

secondary

#D5BB92

accent

#A641E7

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3975D3

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

Preview Lab → · Contrast checker → · Palette generator →