#3757AA#3757AA

#3757AA is a mid, vivid blue. Relative luminance 0.105; OKLCH L 47.8% C 0.138 H 265.6°. Best body text is #FFFFFF at 6.76:1 contrast (WCAG AA passes).

Color values

HEX	#3757AA
RGB	rgb(55, 87, 170)
HSL	hsl(223, 51%, 44%)
HSV	hsv(223, 68%, 67%)
CMYK	cmyk(67.6%, 48.8%, 0%, 33.3%)
CIE-LAB	lab(38.78, 16.37, -48.09)
CIE-LCH	lch(38.78, 50.80, 288.79°)
OKLab	oklab(47.8% -0.0106 -0.1378)
OKLCH	oklch(47.8% 0.138 265.6)
XYZ	xyz(12.2369, 10.5297, 39.4100)
Luminance	0.1053 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3757AA #AA8A37

analogous

#3791AA #3757AA #5137AA

triadic

#3757AA #AA3757 #57AA37

tetradic

#3757AA #AA3791 #AA8A37 #37AA51

square

#3757AA #AA3791 #AA8A37 #37AA51

split-complementary

#3757AA #AA5137 #91AA37

monochromatic

#19284E #283F7C #3757AA #5676C8 #849BD7

Accessibility & contrast

On white

6.76

#3757AA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.11

#3757AA on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3757AA

6.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3757AA	#FFFFFF	#000000	##FFFFFF
##3757AA	1.00	6.76	3.11	6.76
#FFFFFF	6.76	1.00	21.00	1.00
#000000	3.11	21.00	1.00	21.00
##FFFFFF	6.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2B61AD

Deuteranopia (green-blind)

#0E56A8

Tritanopia (blue-blind)

#006A78

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #3757aa;
/* rgb */ color: rgb(55, 87, 170);
/* oklch */ color: oklch(47.8% 0.138 265.6);

Tailwind

colors: {
  custom: {
    50: '#7b85c4',
    500: '#3757aa',
    950: '#000000',
  },
}

SCSS

$custom: #3757aa;
$custom-light: #7b85c4;
$custom-dark: #000000;

JSON

{
  "hex": "#3757aa",
  "rgb": {
    "r": 55,
    "g": 87,
    "b": 170
  },
  "hsl": {
    "h": 223.304,
    "s": 51.111,
    "l": 44.118
  },
  "oklch": {
    "l": 0.47798,
    "c": 0.13821,
    "h": 265.6
  },
  "luminance": 0.10531
}

Semantic roles & 50–950 ramp

primary

#3757AA

secondary

#C1AE7C

accent

#B34DDB

background

#F8F8FC

surface

#EFEFF8

border

#CACAD1

text

#0A0B13

muted

#7C7C82

Preview Lab

Preview with #3757AA

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

Preview Lab → · Contrast checker → · Palette generator →