#4037BC#4037BC

#4037BC is a dark, vivid blue. Relative luminance 0.075; OKLCH L 44.0% C 0.199 H 277.4°. Best body text is #FFFFFF at 8.43:1 contrast (WCAG AA passes).

Color values

HEX	#4037BC
RGB	rgb(64, 55, 188)
HSL	hsl(244, 55%, 48%)
HSV	hsv(244, 71%, 74%)
CMYK	cmyk(66%, 70.7%, 0%, 26.3%)
CIE-LAB	lab(32.81, 44.23, -68.41)
CIE-LCH	lch(32.81, 81.47, 302.88°)
OKLab	oklab(43.97% 0.0255 -0.1975)
OKLCH	oklch(43.97% 0.199 277.4)
XYZ	xyz(12.5547, 7.4521, 48.3440)
Luminance	0.0745 (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

#4037BC #B3BC37

analogous

#3771BC #4037BC #8237BC

triadic

#4037BC #BC4037 #37BC40

tetradic

#4037BC #BC3771 #B3BC37 #37BC82

square

#4037BC #BC3771 #B3BC37 #37BC82

split-complementary

#4037BC #BC8237 #71BC37

monochromatic

#201B5D #30298D #4037BC #6760D0 #948FDE

Accessibility & contrast

On white

8.43

#4037BC on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.49

#4037BC on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4037BC

8.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4037BC	#FFFFFF	#000000	##FFFFFF
##4037BC	1.00	8.43	2.49	8.43
#FFFFFF	8.43	1.00	21.00	1.00
#000000	2.49	21.00	1.00	21.00
##FFFFFF	8.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053C0

Deuteranopia (green-blind)

#0047BA

Tritanopia (blue-blind)

#005B75

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #4037bc;
/* rgb */ color: rgb(64, 55, 188);
/* oklch */ color: oklch(44.0% 0.199 277.4);

Tailwind

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

SCSS

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

JSON

{
  "hex": "#4037bc",
  "rgb": {
    "r": 64,
    "g": 55,
    "b": 188
  },
  "hsl": {
    "h": 244.06,
    "s": 54.733,
    "l": 47.647
  },
  "oklch": {
    "l": 0.43967,
    "c": 0.19917,
    "h": 277.4
  },
  "luminance": 0.07453
}

Semantic roles & 50–950 ramp

primary

#4037BC

secondary

#C4C986

accent

#DE4AD4

background

#F8F6FD

surface

#F0ECFA

border

#CBC7D3

text

#0C0714

muted

#7D7A83

Preview Lab

Preview with #4037BC

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

Preview Lab → · Contrast checker → · Palette generator →