#3957BF#3957BF

#3957BF is a mid, vivid blue. Relative luminance 0.114; OKLCH L 49.5% C 0.167 H 267.7°. Best body text is #FFFFFF at 6.38:1 contrast (WCAG AA passes).

Color values

HEX	#3957BF
RGB	rgb(57, 87, 191)
HSL	hsl(227, 54%, 49%)
HSV	hsv(227, 70%, 75%)
CMYK	cmyk(70.2%, 54.5%, 0%, 25.1%)
CIE-LAB	lab(40.32, 24.37, -57.94)
CIE-LCH	lch(40.32, 62.85, 292.82°)
OKLab	oklab(49.46% -0.0067 -0.1667)
OKLCH	oklch(49.46% 0.167 267.7)
XYZ	xyz(14.4963, 11.4464, 50.7255)
Luminance	0.1145 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3957BF #BFA139

analogous

#399ABF #3957BF #5E39BF

triadic

#3957BF #BF3957 #57BF39

tetradic

#3957BF #BF399A #BFA139 #39BF5E

square

#3957BF #BF399A #BFA139 #39BF5E

split-complementary

#3957BF #BF5E39 #9ABF39

monochromatic

#1D2C61 #2B4290 #3957BF #647DD1 #93A4DF

Accessibility & contrast

On white

6.38

#3957BF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.29

#3957BF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3957BF

6.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3957BF	#FFFFFF	#000000	##FFFFFF
##3957BF	1.00	6.38	3.29	6.38
#FFFFFF	6.38	1.00	21.00	1.00
#000000	3.29	21.00	1.00	21.00
##FFFFFF	6.38	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0065C3

Deuteranopia (green-blind)

#0059BD

Tritanopia (blue-blind)

#007082

Achromatopsia (no color)

#5F5F5F

Design tokens & code

CSS

--color: #3957bf;
/* rgb */ color: rgb(57, 87, 191);
/* oklch */ color: oklch(49.5% 0.167 267.7);

Tailwind

colors: {
  custom: {
    50: '#8086d3',
    500: '#3957bf',
    950: '#000000',
  },
}

SCSS

$custom: #3957bf;
$custom-light: #8086d3;
$custom-dark: #000000;

JSON

{
  "hex": "#3957bf",
  "rgb": {
    "r": 57,
    "g": 87,
    "b": 191
  },
  "hsl": {
    "h": 226.567,
    "s": 54.032,
    "l": 48.627
  },
  "oklch": {
    "l": 0.49458,
    "c": 0.16686,
    "h": 267.7
  },
  "luminance": 0.11448
}

Semantic roles & 50–950 ramp

primary

#3957BF

secondary

#CABC8A

accent

#BC4ADD

background

#F8F8FD

surface

#F0EFFA

border

#CBCAD3

text

#0B0B14

muted

#7C7C83

Preview Lab

Preview with #3957BF

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

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