#4037BB#4037BB

#4037BB is a dark, vivid blue. Relative luminance 0.074; OKLCH L 43.9% C 0.198 H 277.5°. Best body text is #FFFFFF at 8.46:1 contrast (WCAG AA passes).

Color values

HEX	#4037BB
RGB	rgb(64, 55, 187)
HSL	hsl(244, 55%, 47%)
HSV	hsv(244, 71%, 73%)
CMYK	cmyk(65.8%, 70.6%, 0%, 26.7%)
CIE-LAB	lab(32.72, 43.91, -67.98)
CIE-LCH	lch(32.72, 80.93, 302.86°)
OKLab	oklab(43.87% 0.0257 -0.1963)
OKLCH	oklch(43.87% 0.198 277.5)
XYZ	xyz(12.4473, 7.4092, 47.7782)
Luminance	0.0741 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4037BB #B2BB37

analogous

#3770BB #4037BB #8237BB

triadic

#4037BB #BB4037 #37BB40

tetradic

#4037BB #BB3770 #B2BB37 #37BB82

square

#4037BB #BB3770 #B2BB37 #37BB82

split-complementary

#4037BB #BB8237 #70BB37

monochromatic

#201B5C #30298C #4037BB #675FD0 #948EDE

Accessibility & contrast

On white

8.46

#4037BB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.48

#4037BB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4037BB

8.46:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4037BB	#FFFFFF	#000000	##FFFFFF
##4037BB	1.00	8.46	2.48	8.46
#FFFFFF	8.46	1.00	21.00	1.00
#000000	2.48	21.00	1.00	21.00
##FFFFFF	8.46	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052BF

Deuteranopia (green-blind)

#0047B9

Tritanopia (blue-blind)

#005B75

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #4037bb;
/* rgb */ color: rgb(64, 55, 187);
/* oklch */ color: oklch(43.9% 0.198 277.5);

Tailwind

colors: {
  custom: {
    50: '#856fd1',
    500: '#4037bb',
    950: '#000000',
  },
}

SCSS

$custom: #4037bb;
$custom-light: #856fd1;
$custom-dark: #000000;

JSON

{
  "hex": "#4037bb",
  "rgb": {
    "r": 64,
    "g": 55,
    "b": 187
  },
  "hsl": {
    "h": 244.091,
    "s": 54.545,
    "l": 47.451
  },
  "oklch": {
    "l": 0.43872,
    "c": 0.19793,
    "h": 277.5
  },
  "luminance": 0.0741
}

Semantic roles & 50–950 ramp

primary

#4037BB

secondary

#C4C985

accent

#DE4AD4

background

#F8F6FD

surface

#F0ECFA

border

#CBC7D3

text

#0C0714

muted

#7D7A83

Preview Lab

Preview with #4037BB

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

Preview Lab → · Contrast checker → · Palette generator →