#3957B9#3957B9

#3957B9 is a mid, vivid blue. Relative luminance 0.112; OKLCH L 49.0% C 0.159 H 267.4°. Best body text is #FFFFFF at 6.49:1 contrast (WCAG AA passes).

Color values

HEX	#3957B9
RGB	rgb(57, 87, 185)
HSL	hsl(226, 53%, 47%)
HSV	hsv(226, 69%, 73%)
CMYK	cmyk(69.2%, 53%, 0%, 27.5%)
CIE-LAB	lab(39.89, 22.18, -55.12)
CIE-LCH	lch(39.89, 59.42, 291.92°)
OKLab	oklab(49% -0.0071 -0.1584)
OKLCH	oklch(49% 0.159 267.4)
XYZ	xyz(13.8495, 11.1877, 47.3191)
Luminance	0.1119 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3957B9 #B99B39

analogous

#3997B9 #3957B9 #5B39B9

triadic

#3957B9 #B93957 #57B939

tetradic

#3957B9 #B93997 #B99B39 #39B95B

square

#3957B9 #B93997 #B99B39 #39B95B

split-complementary

#3957B9 #B95B39 #97B939

monochromatic

#1C2B5B #2B418A #3957B9 #617BCE #90A2DD

Accessibility & contrast

On white

6.49

#3957B9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.24

#3957B9 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3957B9

6.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3957B9	#FFFFFF	#000000	##FFFFFF
##3957B9	1.00	6.49	3.24	6.49
#FFFFFF	6.49	1.00	21.00	1.00
#000000	3.24	21.00	1.00	21.00
##FFFFFF	6.49	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1464BC

Deuteranopia (green-blind)

#0058B7

Tritanopia (blue-blind)

#006E7F

Achromatopsia (no color)

#5E5E5E

Design tokens & code

CSS

--color: #3957b9;
/* rgb */ color: rgb(57, 87, 185);
/* oklch */ color: oklch(49.0% 0.159 267.4);

Tailwind

colors: {
  custom: {
    50: '#7f85cf',
    500: '#3957b9',
    950: '#000000',
  },
}

SCSS

$custom: #3957b9;
$custom-light: #7f85cf;
$custom-dark: #000000;

JSON

{
  "hex": "#3957b9",
  "rgb": {
    "r": 57,
    "g": 87,
    "b": 185
  },
  "hsl": {
    "h": 225.938,
    "s": 52.893,
    "l": 47.451
  },
  "oklch": {
    "l": 0.48999,
    "c": 0.15861,
    "h": 267.4
  },
  "luminance": 0.11189
}

Semantic roles & 50–950 ramp

primary

#3957B9

secondary

#C8B886

accent

#BA4BDC

background

#F8F8FC

surface

#EFEFF9

border

#CACAD2

text

#0B0B14

muted

#7C7C82

Preview Lab

Preview with #3957B9

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

Preview Lab → · Contrast checker → · Palette generator →