#4237BE#4237BE

#4237BE is a dark, highly saturated blue. Relative luminance 0.076; OKLCH L 44.3% C 0.201 H 277.9°. Best body text is #FFFFFF at 8.33:1 contrast (WCAG AA passes).

Color values

HEX	#4237BE
RGB	rgb(66, 55, 190)
HSL	hsl(245, 55%, 48%)
HSV	hsv(245, 71%, 75%)
CMYK	cmyk(65.3%, 71.1%, 0%, 25.5%)
CIE-LAB	lab(33.15, 45.12, -69.03)
CIE-LCH	lch(33.15, 82.47, 303.17°)
OKLab	oklab(44.3% 0.0278 -0.1993)
OKLCH	oklch(44.3% 0.201 277.9)
XYZ	xyz(12.9042, 7.6073, 49.4935)
Luminance	0.0761 (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

#4237BE #B3BE37

analogous

#376FBE #4237BE #8537BE

triadic

#4237BE #BE4237 #37BE42

tetradic

#4237BE #BE376F #B3BE37 #37BE85

square

#4237BE #BE376F #B3BE37 #37BE85

split-complementary

#4237BE #BE8537 #6FBE37

monochromatic

#211C5F #32298F #4237BE #6A61D1 #9790DF

Accessibility & contrast

On white

8.33

#4237BE on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.52

#4237BE on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4237BE

8.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4237BE	#FFFFFF	#000000	##FFFFFF
##4237BE	1.00	8.33	2.52	8.33
#FFFFFF	8.33	1.00	21.00	1.00
#000000	2.52	21.00	1.00	21.00
##FFFFFF	8.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053C2

Deuteranopia (green-blind)

#0048BB

Tritanopia (blue-blind)

#005C77

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #4237be;
/* rgb */ color: rgb(66, 55, 190);
/* oklch */ color: oklch(44.3% 0.201 277.9);

Tailwind

colors: {
  custom: {
    50: '#866fd3',
    500: '#4237be',
    950: '#000000',
  },
}

SCSS

$custom: #4237be;
$custom-light: #866fd3;
$custom-dark: #000000;

JSON

{
  "hex": "#4237be",
  "rgb": {
    "r": 66,
    "g": 55,
    "b": 190
  },
  "hsl": {
    "h": 244.889,
    "s": 55.102,
    "l": 48.039
  },
  "oklch": {
    "l": 0.44303,
    "c": 0.20121,
    "h": 277.9
  },
  "luminance": 0.07608
}

Semantic roles & 50–950 ramp

primary

#4237BE

secondary

#C4CA87

accent

#DE49D2

background

#F8F6FD

surface

#F0ECFA

border

#CBC7D3

text

#0D0714

muted

#7D7A83

Preview Lab

Preview with #4237BE

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

Preview Lab → · Contrast checker → · Palette generator →