#4039BF#4039BF

#4039BF is a dark, highly saturated blue. Relative luminance 0.078; OKLCH L 44.6% C 0.201 H 276.8°. Best body text is #FFFFFF at 8.22:1 contrast (WCAG AA passes).

Color values

HEX	#4039BF
RGB	rgb(64, 57, 191)
HSL	hsl(243, 54%, 49%)
HSV	hsv(243, 70%, 75%)
CMYK	cmyk(66.5%, 70.2%, 0%, 25.1%)
CIE-LAB	lab(33.51, 44.05, -69.03)
CIE-LCH	lch(33.51, 81.89, 302.54°)
OKLab	oklab(44.55% 0.0237 -0.1993)
OKLCH	oklch(44.55% 0.201 276.8)
XYZ	xyz(12.9784, 7.7767, 50.0972)
Luminance	0.0778 (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

#4039BF #B8BF39

analogous

#3975BF #4039BF #8339BF

triadic

#4039BF #BF4039 #39BF40

tetradic

#4039BF #BF3975 #B8BF39 #39BF83

square

#4039BF #BF3975 #B8BF39 #39BF83

split-complementary

#4039BF #BF8339 #75BF39

monochromatic

#201D61 #302B90 #4039BF #6A64D1 #9793DF

Accessibility & contrast

On white

8.22

#4039BF on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.56

#4039BF on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4039BF

8.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4039BF	#FFFFFF	#000000	##FFFFFF
##4039BF	1.00	8.22	2.56	8.22
#FFFFFF	8.22	1.00	21.00	1.00
#000000	2.56	21.00	1.00	21.00
##FFFFFF	8.22	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054C3

Deuteranopia (green-blind)

#0049BD

Tritanopia (blue-blind)

#005E78

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #4039bf;
/* rgb */ color: rgb(64, 57, 191);
/* oklch */ color: oklch(44.6% 0.201 276.8);

Tailwind

colors: {
  custom: {
    50: '#8571d3',
    500: '#4039bf',
    950: '#000000',
  },
}

SCSS

$custom: #4039bf;
$custom-light: #8571d3;
$custom-dark: #000000;

JSON

{
  "hex": "#4039bf",
  "rgb": {
    "r": 64,
    "g": 57,
    "b": 191
  },
  "hsl": {
    "h": 243.134,
    "s": 54.032,
    "l": 48.627
  },
  "oklch": {
    "l": 0.44553,
    "c": 0.20075,
    "h": 276.8
  },
  "luminance": 0.07778
}

Semantic roles & 50–950 ramp

primary

#4039BF

secondary

#C7CA8A

accent

#DD4AD6

background

#F8F6FD

surface

#F0ECFA

border

#CBC7D3

text

#0C0814

muted

#7D7B83

Preview Lab

Preview with #4039BF

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

Preview Lab → · Contrast checker → · Palette generator →