#4037EA#4037EA

#4037EA is a mid, highly saturated blue. Relative luminance 0.098; OKLCH L 48.6% C 0.253 H 273.7°. Best body text is #FFFFFF at 7.11:1 contrast (WCAG AA passes).

Color values

HEX	#4037EA
RGB	rgb(64, 55, 234)
HSL	hsl(243, 81%, 57%)
HSV	hsv(243, 76%, 92%)
CMYK	cmyk(72.6%, 76.5%, 0%, 8.2%)
CIE-LAB	lab(37.41, 58.64, -87.44)
CIE-LCH	lch(37.41, 105.28, 303.85°)
OKLab	oklab(48.59% 0.0165 -0.2529)
OKLCH	oklch(48.59% 0.253 273.7)
XYZ	xyz(18.3269, 9.7610, 78.7442)
Luminance	0.0976 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4037EA #E1EA37

analogous

#3788EA #4037EA #9A37EA

triadic

#4037EA #EA4037 #37EA40

tetradic

#4037EA #EA3788 #E1EA37 #37EA9A

square

#4037EA #EA3788 #E1EA37 #37EA9A

split-complementary

#4037EA #EA9A37 #88EA37

monochromatic

#171097 #1F16CE #4037EA #756EF0 #AAA6F6

Accessibility & contrast

On white

7.11

#4037EA on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.95

#4037EA on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4037EA

7.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4037EA	#FFFFFF	#000000	##FFFFFF
##4037EA	1.00	7.11	2.95	7.11
#FFFFFF	7.11	1.00	21.00	1.00
#000000	2.95	21.00	1.00	21.00
##FFFFFF	7.11	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0060EF

Deuteranopia (green-blind)

#004FE7

Tritanopia (blue-blind)

#006D8F

Achromatopsia (no color)

#585858

Design tokens & code

CSS

--color: #4037ea;
/* rgb */ color: rgb(64, 55, 234);
/* oklch */ color: oklch(48.6% 0.253 273.7);

Tailwind

colors: {
  custom: {
    50: '#8e71f2',
    500: '#4037ea',
    950: '#000000',
  },
}

SCSS

$custom: #4037ea;
$custom-light: #8e71f2;
$custom-dark: #000000;

JSON

{
  "hex": "#4037ea",
  "rgb": {
    "r": 64,
    "g": 55,
    "b": 234
  },
  "hsl": {
    "h": 243.017,
    "s": 80.995,
    "l": 56.667
  },
  "oklch": {
    "l": 0.48591,
    "c": 0.25349,
    "h": 273.7
  },
  "luminance": 0.09763
}

Semantic roles & 50–950 ramp

primary

#4037EA

secondary

#DFE39A

accent

#F730ED

background

#F9F7FF

surface

#F2EDFE

border

#CCC8D6

text

#0F0817

muted

#7E7B85

Preview Lab

Preview with #4037EA

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

Preview Lab → · Contrast checker → · Palette generator →