#3957B3#3957B3

#3957B3 is a mid, vivid blue. Relative luminance 0.109; OKLCH L 48.6% C 0.150 H 267.1°. Best body text is #FFFFFF at 6.59:1 contrast (WCAG AA passes).

Color values

HEX	#3957B3
RGB	rgb(57, 87, 179)
HSL	hsl(225, 52%, 46%)
HSV	hsv(225, 68%, 70%)
CMYK	cmyk(68.2%, 51.4%, 0%, 29.8%)
CIE-LAB	lab(39.48, 19.99, -52.27)
CIE-LCH	lch(39.48, 55.96, 290.93°)
OKLab	oklab(48.55% -0.0077 -0.1501)
OKLCH	oklch(48.55% 0.15 267.1)
XYZ	xyz(13.2294, 10.9396, 44.0535)
Luminance	0.1094 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3957B3 #B39539

analogous

#3994B3 #3957B3 #5839B3

triadic

#3957B3 #B33957 #57B339

tetradic

#3957B3 #B33994 #B39539 #39B358

square

#3957B3 #B33994 #B39539 #39B358

split-complementary

#3957B3 #B35839 #94B339

monochromatic

#1B2A56 #2A4085 #3957B3 #5E79CC #8C9FDA

Accessibility & contrast

On white

6.59

#3957B3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.19

#3957B3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3957B3

6.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3957B3	#FFFFFF	#000000	##FFFFFF
##3957B3	1.00	6.59	3.19	6.59
#FFFFFF	6.59	1.00	21.00	1.00
#000000	3.19	21.00	1.00	21.00
##FFFFFF	6.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2063B6

Deuteranopia (green-blind)

#0058B1

Tritanopia (blue-blind)

#006D7C

Achromatopsia (no color)

#5D5D5D

Design tokens & code

CSS

--color: #3957b3;
/* rgb */ color: rgb(57, 87, 179);
/* oklch */ color: oklch(48.6% 0.150 267.1);

Tailwind

colors: {
  custom: {
    50: '#7d85ca',
    500: '#3957b3',
    950: '#000000',
  },
}

SCSS

$custom: #3957b3;
$custom-light: #7d85ca;
$custom-dark: #000000;

JSON

{
  "hex": "#3957b3",
  "rgb": {
    "r": 57,
    "g": 87,
    "b": 179
  },
  "hsl": {
    "h": 225.246,
    "s": 51.695,
    "l": 46.275
  },
  "oklch": {
    "l": 0.48552,
    "c": 0.15026,
    "h": 267.1
  },
  "luminance": 0.10941
}

Semantic roles & 50–950 ramp

primary

#3957B3

secondary

#C5B583

accent

#B84DDB

background

#F8F8FC

surface

#EFEFF8

border

#CACAD1

text

#0B0B13

muted

#7C7C82

Preview Lab

Preview with #3957B3

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

Preview Lab → · Contrast checker → · Palette generator →