#3957BB#3957BB

#3957BB is a mid, vivid blue. Relative luminance 0.113; OKLCH L 49.2% C 0.161 H 267.5°. Best body text is #FFFFFF at 6.45:1 contrast (WCAG AA passes).

Color values

HEX	#3957BB
RGB	rgb(57, 87, 187)
HSL	hsl(226, 53%, 48%)
HSV	hsv(226, 70%, 73%)
CMYK	cmyk(69.5%, 53.5%, 0%, 26.7%)
CIE-LAB	lab(40.04, 22.91, -56.06)
CIE-LCH	lch(40.04, 60.57, 292.23°)
OKLab	oklab(49.15% -0.007 -0.1612)
OKLCH	oklch(49.15% 0.161 267.5)
XYZ	xyz(14.0621, 11.2727, 48.4388)
Luminance	0.1127 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3957BB #BB9D39

analogous

#3998BB #3957BB #5C39BB

triadic

#3957BB #BB3957 #57BB39

tetradic

#3957BB #BB3998 #BB9D39 #39BB5C

square

#3957BB #BB3998 #BB9D39 #39BB5C

split-complementary

#3957BB #BB5C39 #98BB39

monochromatic

#1C2B5D #2B418C #3957BB #627BCF #91A3DD

Accessibility & contrast

On white

6.45

#3957BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.25

#3957BB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3957BB

6.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3957BB	#FFFFFF	#000000	##FFFFFF
##3957BB	1.00	6.45	3.25	6.45
#FFFFFF	6.45	1.00	21.00	1.00
#000000	3.25	21.00	1.00	21.00
##FFFFFF	6.45	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0F65BF

Deuteranopia (green-blind)

#0059B9

Tritanopia (blue-blind)

#006F80

Achromatopsia (no color)

#5E5E5E

Design tokens & code

CSS

--color: #3957bb;
/* rgb */ color: rgb(57, 87, 187);
/* oklch */ color: oklch(49.2% 0.161 267.5);

Tailwind

colors: {
  custom: {
    50: '#7f85d0',
    500: '#3957bb',
    950: '#000000',
  },
}

SCSS

$custom: #3957bb;
$custom-light: #7f85d0;
$custom-dark: #000000;

JSON

{
  "hex": "#3957bb",
  "rgb": {
    "r": 57,
    "g": 87,
    "b": 187
  },
  "hsl": {
    "h": 226.154,
    "s": 53.279,
    "l": 47.843
  },
  "oklch": {
    "l": 0.49151,
    "c": 0.16138,
    "h": 267.5
  },
  "luminance": 0.11274
}

Semantic roles & 50–950 ramp

primary

#3957BB

secondary

#C8B987

accent

#BB4BDD

background

#F8F8FC

surface

#EFEFF9

border

#CACAD2

text

#0B0B14

muted

#7C7C82

Preview Lab

Preview with #3957BB

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

Preview Lab → · Contrast checker → · Palette generator →