#4039B7#4039B7

#4039B7 is a dark, vivid blue. Relative luminance 0.074; OKLCH L 43.8% C 0.191 H 277.5°. Best body text is #FFFFFF at 8.44:1 contrast (WCAG AA passes).

Color values

HEX	#4039B7
RGB	rgb(64, 57, 183)
HSL	hsl(243, 53%, 47%)
HSV	hsv(243, 69%, 72%)
CMYK	cmyk(65%, 68.9%, 0%, 28.2%)
CIE-LAB	lab(32.78, 41.44, -65.52)
CIE-LCH	lch(32.78, 77.53, 302.31°)
OKLab	oklab(43.8% 0.0249 -0.1891)
OKLCH	oklch(43.8% 0.191 277.5)
XYZ	xyz(12.1220, 7.4341, 45.5867)
Luminance	0.0743 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Ocean Blue

#4F42B5

ΔE00 2.98

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4039B7 #B0B739

analogous

#3971B7 #4039B7 #7F39B7

triadic

#4039B7 #B74039 #39B740

tetradic

#4039B7 #B73971 #B0B739 #39B77F

square

#4039B7 #B73971 #B0B739 #39B77F

split-complementary

#4039B7 #B77F39 #71B739

monochromatic

#1F1C5A #302A88 #4039B7 #6660CD #938EDC

Accessibility & contrast

On white

8.44

#4039B7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.49

#4039B7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4039B7

8.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4039B7	#FFFFFF	#000000	##FFFFFF
##4039B7	1.00	8.44	2.49	8.44
#FFFFFF	8.44	1.00	21.00	1.00
#000000	2.49	21.00	1.00	21.00
##FFFFFF	8.44	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052BB

Deuteranopia (green-blind)

#0048B5

Tritanopia (blue-blind)

#005B73

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #4039b7;
/* rgb */ color: rgb(64, 57, 183);
/* oklch */ color: oklch(43.8% 0.191 277.5);

Tailwind

colors: {
  custom: {
    50: '#8470ce',
    500: '#4039b7',
    950: '#000000',
  },
}

SCSS

$custom: #4039b7;
$custom-light: #8470ce;
$custom-dark: #000000;

JSON

{
  "hex": "#4039b7",
  "rgb": {
    "r": 64,
    "g": 57,
    "b": 183
  },
  "hsl": {
    "h": 243.333,
    "s": 52.5,
    "l": 47.059
  },
  "oklch": {
    "l": 0.43798,
    "c": 0.19072,
    "h": 277.5
  },
  "luminance": 0.07435
}

Semantic roles & 50–950 ramp

primary

#4039B7

secondary

#C3C785

accent

#DC4CD4

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0C0714

muted

#7D7A82

Preview Lab

Preview with #4039B7

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

Preview Lab → · Contrast checker → · Palette generator →