#4039E0#4039E0

#4039E0 is a mid, highly saturated blue. Relative luminance 0.094; OKLCH L 47.8% C 0.240 H 274.2°. Best body text is #FFFFFF at 7.29:1 contrast (WCAG AA passes).

Color values

HEX	#4039E0
RGB	rgb(64, 57, 224)
HSL	hsl(243, 73%, 55%)
HSV	hsv(243, 75%, 88%)
CMYK	cmyk(71.4%, 74.6%, 0%, 12.2%)
CIE-LAB	lab(36.74, 54.55, -82.85)
CIE-LCH	lch(36.74, 99.20, 303.36°)
OKLab	oklab(47.81% 0.0177 -0.2396)
OKLCH	oklch(47.81% 0.24 274.2)
XYZ	xyz(17.0276, 9.3964, 71.4229)
Luminance	0.0940 (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

#4039E0 #D9E039

analogous

#3985E0 #4039E0 #9439E0

triadic

#4039E0 #E04039 #39E040

tetradic

#4039E0 #E03985 #D9E039 #39E094

square

#4039E0 #E03985 #D9E039 #39E094

split-complementary

#4039E0 #E09439 #85E039

monochromatic

#1A1589 #241EBE #4039E0 #736EE8 #A6A3F1

Accessibility & contrast

On white

7.29

#4039E0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.88

#4039E0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4039E0

7.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4039E0	#FFFFFF	#000000	##FFFFFF
##4039E0	1.00	7.29	2.88	7.29
#FFFFFF	7.29	1.00	21.00	1.00
#000000	2.88	21.00	1.00	21.00
##FFFFFF	7.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005EE5

Deuteranopia (green-blind)

#004FDD

Tritanopia (blue-blind)

#006A8A

Achromatopsia (no color)

#565656

Design tokens & code

CSS

--color: #4039e0;
/* rgb */ color: rgb(64, 57, 224);
/* oklch */ color: oklch(47.8% 0.240 274.2);

Tailwind

colors: {
  custom: {
    50: '#8c72eb',
    500: '#4039e0',
    950: '#000000',
  },
}

SCSS

$custom: #4039e0;
$custom-light: #8c72eb;
$custom-dark: #000000;

JSON

{
  "hex": "#4039e0",
  "rgb": {
    "r": 64,
    "g": 57,
    "b": 224
  },
  "hsl": {
    "h": 242.515,
    "s": 72.926,
    "l": 55.098
  },
  "oklch": {
    "l": 0.47812,
    "c": 0.24029,
    "h": 274.2
  },
  "luminance": 0.09398
}

Semantic roles & 50–950 ramp

primary

#4039E0

secondary

#DADD97

accent

#F038E8

background

#F9F7FE

surface

#F2EDFD

border

#CCC8D5

text

#0E0816

muted

#7E7B84

Preview Lab

Preview with #4039E0

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

Preview Lab → · Contrast checker → · Palette generator →