#4039B1#4039B1

#4039B1 is a dark, vivid blue. Relative luminance 0.072; OKLCH L 43.2% C 0.183 H 278.1°. Best body text is #FFFFFF at 8.61:1 contrast (WCAG AA passes).

Color values

HEX	#4039B1
RGB	rgb(64, 57, 177)
HSL	hsl(244, 51%, 46%)
HSV	hsv(244, 68%, 69%)
CMYK	cmyk(63.8%, 67.8%, 0%, 30.6%)
CIE-LAB	lab(32.23, 39.47, -62.85)
CIE-LCH	lch(32.23, 74.21, 302.13°)
OKLab	oklab(43.24% 0.0257 -0.1812)
OKLCH	oklch(43.24% 0.183 278.1)
XYZ	xyz(11.5107, 7.1896, 42.3676)
Luminance	0.0719 (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

#4039B1 #AAB139

analogous

#396EB1 #4039B1 #7C39B1

triadic

#4039B1 #B14039 #39B140

tetradic

#4039B1 #B1396E #AAB139 #39B17C

square

#4039B1 #B1396E #AAB139 #39B17C

split-complementary

#4039B1 #B17C39 #6EB139

monochromatic

#1F1B54 #2F2A83 #4039B1 #635DCB #8F8BDA

Accessibility & contrast

On white

8.61

#4039B1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.44

#4039B1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4039B1

8.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4039B1	#FFFFFF	#000000	##FFFFFF
##4039B1	1.00	8.61	2.44	8.61
#FFFFFF	8.61	1.00	21.00	1.00
#000000	2.44	21.00	1.00	21.00
##FFFFFF	8.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051B5

Deuteranopia (green-blind)

#0047AF

Tritanopia (blue-blind)

#005970

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #4039b1;
/* rgb */ color: rgb(64, 57, 177);
/* oklch */ color: oklch(43.2% 0.183 278.1);

Tailwind

colors: {
  custom: {
    50: '#8270c9',
    500: '#4039b1',
    950: '#000000',
  },
}

SCSS

$custom: #4039b1;
$custom-light: #8270c9;
$custom-dark: #000000;

JSON

{
  "hex": "#4039b1",
  "rgb": {
    "r": 64,
    "g": 57,
    "b": 177
  },
  "hsl": {
    "h": 243.5,
    "s": 51.282,
    "l": 45.882
  },
  "oklch": {
    "l": 0.43243,
    "c": 0.18307,
    "h": 278.1
  },
  "luminance": 0.07191
}

Semantic roles & 50–950 ramp

primary

#4039B1

secondary

#C0C482

accent

#DB4DD2

background

#F8F6FC

surface

#F0ECF8

border

#CBC7D1

text

#0C0713

muted

#7D7A82

Preview Lab

Preview with #4039B1

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

Preview Lab → · Contrast checker → · Palette generator →