#4037BF#4037BF

#4037BF is a dark, highly saturated blue. Relative luminance 0.076; OKLCH L 44.3% C 0.203 H 277.1°. Best body text is #FFFFFF at 8.34:1 contrast (WCAG AA passes).

Color values

HEX	#4037BF
RGB	rgb(64, 55, 191)
HSL	hsl(244, 55%, 48%)
HSV	hsv(244, 71%, 75%)
CMYK	cmyk(66.5%, 71.2%, 0%, 25.1%)
CIE-LAB	lab(33.10, 45.20, -69.71)
CIE-LCH	lch(33.10, 83.08, 302.96°)
OKLab	oklab(44.26% 0.025 -0.2013)
OKLCH	oklch(44.26% 0.203 277.1)
XYZ	xyz(12.8815, 7.5828, 50.0649)
Luminance	0.0758 (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

#4037BF #B6BF37

analogous

#3772BF #4037BF #8437BF

triadic

#4037BF #BF4037 #37BF40

tetradic

#4037BF #BF3772 #B6BF37 #37BF84

square

#4037BF #BF3772 #B6BF37 #37BF84

split-complementary

#4037BF #BF8437 #72BF37

monochromatic

#201C60 #30298F #4037BF #6962D2 #9691DF

Accessibility & contrast

On white

8.34

#4037BF on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.52

#4037BF on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4037BF

8.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4037BF	#FFFFFF	#000000	##FFFFFF
##4037BF	1.00	8.34	2.52	8.34
#FFFFFF	8.34	1.00	21.00	1.00
#000000	2.52	21.00	1.00	21.00
##FFFFFF	8.34	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054C3

Deuteranopia (green-blind)

#0048BC

Tritanopia (blue-blind)

#005D77

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #4037bf;
/* rgb */ color: rgb(64, 55, 191);
/* oklch */ color: oklch(44.3% 0.203 277.1);

Tailwind

colors: {
  custom: {
    50: '#856fd4',
    500: '#4037bf',
    950: '#000000',
  },
}

SCSS

$custom: #4037bf;
$custom-light: #856fd4;
$custom-dark: #000000;

JSON

{
  "hex": "#4037bf",
  "rgb": {
    "r": 64,
    "g": 55,
    "b": 191
  },
  "hsl": {
    "h": 243.971,
    "s": 55.285,
    "l": 48.235
  },
  "oklch": {
    "l": 0.44256,
    "c": 0.20288,
    "h": 277.1
  },
  "luminance": 0.07584
}

Semantic roles & 50–950 ramp

primary

#4037BF

secondary

#C6CA88

accent

#DF49D5

background

#F8F6FD

surface

#F0ECFA

border

#CBC7D3

text

#0D0714

muted

#7D7A83

Preview Lab

Preview with #4037BF

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

Preview Lab → · Contrast checker → · Palette generator →