#4037B7#4037B7

#4037B7 is a dark, vivid blue. Relative luminance 0.072; OKLCH L 43.5% C 0.193 H 277.8°. Best body text is #FFFFFF at 8.58:1 contrast (WCAG AA passes).

Color values

HEX	#4037B7
RGB	rgb(64, 55, 183)
HSL	hsl(244, 54%, 47%)
HSV	hsv(244, 70%, 72%)
CMYK	cmyk(65%, 69.9%, 0%, 28.2%)
CIE-LAB	lab(32.35, 42.61, -66.23)
CIE-LCH	lch(32.35, 78.75, 302.76°)
OKLab	oklab(43.49% 0.0263 -0.1911)
OKLCH	oklch(43.49% 0.193 277.8)
XYZ	xyz(12.0250, 7.2403, 45.5544)
Luminance	0.0724 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Ocean Blue

#4F42B5

ΔE00 3.35

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4037B7 #AEB737

analogous

#376EB7 #4037B7 #8037B7

triadic

#4037B7 #B74037 #37B740

tetradic

#4037B7 #B7376E #AEB737 #37B780

square

#4037B7 #B7376E #AEB737 #37B780

split-complementary

#4037B7 #B78037 #6EB737

monochromatic

#1F1B59 #302988 #4037B7 #655DCE #928CDC

Accessibility & contrast

On white

8.58

#4037B7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.45

#4037B7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4037B7

8.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4037B7	#FFFFFF	#000000	##FFFFFF
##4037B7	1.00	8.58	2.45	8.58
#FFFFFF	8.58	1.00	21.00	1.00
#000000	2.45	21.00	1.00	21.00
##FFFFFF	8.58	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051BB

Deuteranopia (green-blind)

#0047B5

Tritanopia (blue-blind)

#005A73

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #4037b7;
/* rgb */ color: rgb(64, 55, 183);
/* oklch */ color: oklch(43.5% 0.193 277.8);

Tailwind

colors: {
  custom: {
    50: '#846fce',
    500: '#4037b7',
    950: '#000000',
  },
}

SCSS

$custom: #4037b7;
$custom-light: #846fce;
$custom-dark: #000000;

JSON

{
  "hex": "#4037b7",
  "rgb": {
    "r": 64,
    "g": 55,
    "b": 183
  },
  "hsl": {
    "h": 244.219,
    "s": 53.782,
    "l": 46.667
  },
  "oklch": {
    "l": 0.43491,
    "c": 0.19294,
    "h": 277.8
  },
  "luminance": 0.07241
}

Semantic roles & 50–950 ramp

primary

#4037B7

secondary

#C2C783

accent

#DD4BD3

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0C0714

muted

#7D7A82

Preview Lab

Preview with #4037B7

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

Preview Lab → · Contrast checker → · Palette generator →