#4037B5#4037B5

#4037B5 is a dark, vivid blue. Relative luminance 0.072; OKLCH L 43.3% C 0.190 H 278.0°. Best body text is #FFFFFF at 8.64:1 contrast (WCAG AA passes).

Color values

HEX	#4037B5
RGB	rgb(64, 55, 181)
HSL	hsl(244, 53%, 46%)
HSV	hsv(244, 70%, 71%)
CMYK	cmyk(64.6%, 69.6%, 0%, 29%)
CIE-LAB	lab(32.16, 41.96, -65.34)
CIE-LCH	lch(32.16, 77.66, 302.71°)
OKLab	oklab(43.3% 0.0266 -0.1886)
OKLCH	oklch(43.3% 0.19 278)
XYZ	xyz(11.8183, 7.1576, 44.4659)
Luminance	0.0716 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Ocean Blue

#4F42B5

ΔE00 3.36

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4037B5 #ACB537

analogous

#376DB5 #4037B5 #7F37B5

triadic

#4037B5 #B54037 #37B540

tetradic

#4037B5 #B5376D #ACB537 #37B57F

square

#4037B5 #B5376D #ACB537 #37B57F

split-complementary

#4037B5 #B57F37 #6DB537

monochromatic

#1F1A57 #2F2986 #4037B5 #645CCD #918BDC

Accessibility & contrast

On white

8.64

#4037B5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.43

#4037B5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4037B5

8.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4037B5	#FFFFFF	#000000	##FFFFFF
##4037B5	1.00	8.64	2.43	8.64
#FFFFFF	8.64	1.00	21.00	1.00
#000000	2.43	21.00	1.00	21.00
##FFFFFF	8.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051B9

Deuteranopia (green-blind)

#0046B3

Tritanopia (blue-blind)

#005972

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #4037b5;
/* rgb */ color: rgb(64, 55, 181);
/* oklch */ color: oklch(43.3% 0.190 278.0);

Tailwind

colors: {
  custom: {
    50: '#836fcc',
    500: '#4037b5',
    950: '#000000',
  },
}

SCSS

$custom: #4037b5;
$custom-light: #836fcc;
$custom-dark: #000000;

JSON

{
  "hex": "#4037b5",
  "rgb": {
    "r": 64,
    "g": 55,
    "b": 181
  },
  "hsl": {
    "h": 244.286,
    "s": 53.39,
    "l": 46.275
  },
  "oklch": {
    "l": 0.43302,
    "c": 0.19043,
    "h": 278
  },
  "luminance": 0.07159
}

Semantic roles & 50–950 ramp

primary

#4037B5

secondary

#C1C682

accent

#DD4BD2

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0C0714

muted

#7D7A82

Preview Lab

Preview with #4037B5

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

Preview Lab → · Contrast checker → · Palette generator →