#3957AA#3957AA

#3957AA is a mid, vivid blue. Relative luminance 0.106; OKLCH L 47.9% C 0.138 H 266.3°. Best body text is #FFFFFF at 6.74:1 contrast (WCAG AA passes).

Color values

HEX	#3957AA
RGB	rgb(57, 87, 170)
HSL	hsl(224, 50%, 45%)
HSV	hsv(224, 66%, 67%)
CMYK	cmyk(66.5%, 48.8%, 0%, 33.3%)
CIE-LAB	lab(38.88, 16.70, -47.92)
CIE-LCH	lch(38.88, 50.75, 289.21°)
OKLab	oklab(47.9% -0.0088 -0.1373)
OKLCH	oklch(47.9% 0.138 266.3)
XYZ	xyz(12.3487, 10.5874, 39.4152)
Luminance	0.1059 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3957AA #AA8C39

analogous

#3990AA #3957AA #5439AA

triadic

#3957AA #AA3957 #57AA39

tetradic

#3957AA #AA3990 #AA8C39 #39AA54

square

#3957AA #AA3990 #AA8C39 #39AA54

split-complementary

#3957AA #AA5439 #90AA39

monochromatic

#1A284E #2A407C #3957AA #5976C7 #879CD7

Accessibility & contrast

On white

6.74

#3957AA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.12

#3957AA on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3957AA

6.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3957AA	#FFFFFF	#000000	##FFFFFF
##3957AA	1.00	6.74	3.12	6.74
#FFFFFF	6.74	1.00	21.00	1.00
#000000	3.12	21.00	1.00	21.00
##FFFFFF	6.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2B61AD

Deuteranopia (green-blind)

#1157A8

Tritanopia (blue-blind)

#006A78

Achromatopsia (no color)

#5C5C5C

Design tokens & code

CSS

--color: #3957aa;
/* rgb */ color: rgb(57, 87, 170);
/* oklch */ color: oklch(47.9% 0.138 266.3);

Tailwind

colors: {
  custom: {
    50: '#7c85c4',
    500: '#3957aa',
    950: '#000000',
  },
}

SCSS

$custom: #3957aa;
$custom-light: #7c85c4;
$custom-dark: #000000;

JSON

{
  "hex": "#3957aa",
  "rgb": {
    "r": 57,
    "g": 87,
    "b": 170
  },
  "hsl": {
    "h": 224.071,
    "s": 49.78,
    "l": 44.51
  },
  "oklch": {
    "l": 0.47901,
    "c": 0.13755,
    "h": 266.3
  },
  "luminance": 0.10589
}

Semantic roles & 50–950 ramp

primary

#3957AA

secondary

#C1AF7E

accent

#B44ED9

background

#F8F8FC

surface

#EFEFF8

border

#CACAD1

text

#0A0B13

muted

#7C7C82

Preview Lab

Preview with #3957AA

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

Preview Lab → · Contrast checker → · Palette generator →