#4039B5#4039B5

#4039B5 is a dark, vivid blue. Relative luminance 0.074; OKLCH L 43.6% C 0.188 H 277.7°. Best body text is #FFFFFF at 8.50:1 contrast (WCAG AA passes).

Color values

HEX	#4039B5
RGB	rgb(64, 57, 181)
HSL	hsl(243, 52%, 47%)
HSV	hsv(243, 69%, 71%)
CMYK	cmyk(64.6%, 68.5%, 0%, 29%)
CIE-LAB	lab(32.59, 40.78, -64.64)
CIE-LCH	lch(32.59, 76.43, 302.25°)
OKLab	oklab(43.61% 0.0252 -0.1865)
OKLCH	oklch(43.61% 0.188 277.7)
XYZ	xyz(11.9153, 7.3515, 44.4982)
Luminance	0.0735 (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

#4039B5 #AEB539

analogous

#3970B5 #4039B5 #7E39B5

triadic

#4039B5 #B54039 #39B540

tetradic

#4039B5 #B53970 #AEB539 #39B57E

square

#4039B5 #B53970 #AEB539 #39B57E

split-complementary

#4039B5 #B57E39 #70B539

monochromatic

#1F1C58 #302A86 #4039B5 #655FCD #928DDB

Accessibility & contrast

On white

8.50

#4039B5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.47

#4039B5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4039B5

8.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4039B5	#FFFFFF	#000000	##FFFFFF
##4039B5	1.00	8.50	2.47	8.50
#FFFFFF	8.50	1.00	21.00	1.00
#000000	2.47	21.00	1.00	21.00
##FFFFFF	8.50	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052B9

Deuteranopia (green-blind)

#0047B3

Tritanopia (blue-blind)

#005A72

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #4039b5;
/* rgb */ color: rgb(64, 57, 181);
/* oklch */ color: oklch(43.6% 0.188 277.7);

Tailwind

colors: {
  custom: {
    50: '#8370cc',
    500: '#4039b5',
    950: '#000000',
  },
}

SCSS

$custom: #4039b5;
$custom-light: #8370cc;
$custom-dark: #000000;

JSON

{
  "hex": "#4039b5",
  "rgb": {
    "r": 64,
    "g": 57,
    "b": 181
  },
  "hsl": {
    "h": 243.387,
    "s": 52.101,
    "l": 46.667
  },
  "oklch": {
    "l": 0.43612,
    "c": 0.18818,
    "h": 277.7
  },
  "luminance": 0.07352
}

Semantic roles & 50–950 ramp

primary

#4039B5

secondary

#C2C684

accent

#DC4CD3

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0C0714

muted

#7D7A82

Preview Lab

Preview with #4039B5

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

Preview Lab → · Contrast checker → · Palette generator →