#4040E4#4040E4

#4040E4 is a mid, highly saturated blue. Relative luminance 0.104; OKLCH L 49.2% C 0.238 H 273.3°. Best body text is #FFFFFF at 6.84:1 contrast (WCAG AA passes).

Color values

HEX	#4040E4
RGB	rgb(64, 64, 228)
HSL	hsl(240, 75%, 57%)
HSV	hsv(240, 72%, 89%)
CMYK	cmyk(71.9%, 71.9%, 0%, 10.6%)
CIE-LAB	lab(38.47, 52.04, -82.26)
CIE-LCH	lch(38.47, 97.34, 302.32°)
OKLab	oklab(49.16% 0.0137 -0.238)
OKLCH	oklch(49.16% 0.238 273.3)
XYZ	xyz(17.9467, 10.3564, 74.4369)
Luminance	0.1036 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4040E4 #E4E440

analogous

#4092E4 #4040E4 #9240E4

triadic

#4040E4 #E44040 #40E440

tetradic

#4040E4 #E44092 #E4E440 #40E492

square

#4040E4 #E44092 #E4E440 #40E492

split-complementary

#4040E4 #E49240 #92E440

monochromatic

#151595 #1D1DCA #4040E4 #7676EC #ABABF3

Accessibility & contrast

On white

6.84

#4040E4 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.07

#4040E4 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4040E4

6.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4040E4	#FFFFFF	#000000	##FFFFFF
##4040E4	1.00	6.84	3.07	6.84
#FFFFFF	6.84	1.00	21.00	1.00
#000000	3.07	21.00	1.00	21.00
##FFFFFF	6.84	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0062E9

Deuteranopia (green-blind)

#0053E1

Tritanopia (blue-blind)

#006F8E

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #4040e4;
/* rgb */ color: rgb(64, 64, 228);
/* oklch */ color: oklch(49.2% 0.238 273.3);

Tailwind

colors: {
  custom: {
    50: '#8c77ee',
    500: '#4040e4',
    950: '#000000',
  },
}

SCSS

$custom: #4040e4;
$custom-light: #8c77ee;
$custom-dark: #000000;

JSON

{
  "hex": "#4040e4",
  "rgb": {
    "r": 64,
    "g": 64,
    "b": 228
  },
  "hsl": {
    "h": 240,
    "s": 75.229,
    "l": 57.255
  },
  "oklch": {
    "l": 0.49164,
    "c": 0.23838,
    "h": 273.3
  },
  "luminance": 0.10358
}

Semantic roles & 50–950 ramp

primary

#4040E4

secondary

#E1E19F

accent

#F236F2

background

#F9F7FE

surface

#F2EDFD

border

#CCC8D5

text

#0E0917

muted

#7E7B85

Preview Lab

Preview with #4040E4

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

Preview Lab → · Contrast checker → · Palette generator →