#4039B2#4039B2

#4039B2 is a dark, vivid blue. Relative luminance 0.072; OKLCH L 43.3% C 0.184 H 278.0°. Best body text is #FFFFFF at 8.58:1 contrast (WCAG AA passes).

Color values

HEX	#4039B2
RGB	rgb(64, 57, 178)
HSL	hsl(243, 51%, 46%)
HSV	hsv(243, 68%, 70%)
CMYK	cmyk(64%, 68%, 0%, 30.2%)
CIE-LAB	lab(32.32, 39.80, -63.30)
CIE-LCH	lch(32.32, 74.77, 302.16°)
OKLab	oklab(43.34% 0.0256 -0.1826)
OKLCH	oklch(43.34% 0.184 278)
XYZ	xyz(11.6108, 7.2297, 42.8945)
Luminance	0.0723 (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

#4039B2 #ABB239

analogous

#396EB2 #4039B2 #7C39B2

triadic

#4039B2 #B24039 #39B240

tetradic

#4039B2 #B2396E #ABB239 #39B27C

square

#4039B2 #B2396E #ABB239 #39B27C

split-complementary

#4039B2 #B27C39 #6EB239

monochromatic

#1F1B55 #2F2A84 #4039B2 #635DCB #908BDA

Accessibility & contrast

On white

8.58

#4039B2 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.45

#4039B2 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4039B2

8.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4039B2	#FFFFFF	#000000	##FFFFFF
##4039B2	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)

#0051B6

Deuteranopia (green-blind)

#0047B0

Tritanopia (blue-blind)

#005971

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #4039b2;
/* rgb */ color: rgb(64, 57, 178);
/* oklch */ color: oklch(43.3% 0.184 278.0);

Tailwind

colors: {
  custom: {
    50: '#8370ca',
    500: '#4039b2',
    950: '#000000',
  },
}

SCSS

$custom: #4039b2;
$custom-light: #8370ca;
$custom-dark: #000000;

JSON

{
  "hex": "#4039b2",
  "rgb": {
    "r": 64,
    "g": 57,
    "b": 178
  },
  "hsl": {
    "h": 243.471,
    "s": 51.489,
    "l": 46.078
  },
  "oklch": {
    "l": 0.43335,
    "c": 0.18434,
    "h": 278
  },
  "luminance": 0.07231
}

Semantic roles & 50–950 ramp

primary

#4039B2

secondary

#C1C482

accent

#DB4DD3

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0C0713

muted

#7D7A82

Preview Lab

Preview with #4039B2

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

Preview Lab → · Contrast checker → · Palette generator →