#4237BD#4237BD

#4237BD is a dark, vivid blue. Relative luminance 0.076; OKLCH L 44.2% C 0.200 H 278.0°. Best body text is #FFFFFF at 8.36:1 contrast (WCAG AA passes).

Color values

HEX	#4237BD
RGB	rgb(66, 55, 189)
HSL	hsl(245, 55%, 48%)
HSV	hsv(245, 71%, 74%)
CMYK	cmyk(65.1%, 70.9%, 0%, 25.9%)
CIE-LAB	lab(33.06, 44.80, -68.60)
CIE-LCH	lch(33.06, 81.93, 303.15°)
OKLab	oklab(44.21% 0.0279 -0.198)
OKLCH	oklch(44.21% 0.2 278)
XYZ	xyz(12.7953, 7.5637, 48.9199)
Luminance	0.0756 (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

#4237BD #B2BD37

analogous

#376FBD #4237BD #8537BD

triadic

#4237BD #BD4237 #37BD42

tetradic

#4237BD #BD376F #B2BD37 #37BD85

square

#4237BD #BD376F #B2BD37 #37BD85

split-complementary

#4237BD #BD8537 #6FBD37

monochromatic

#211B5E #31298E #4237BD #6A60D1 #9690DF

Accessibility & contrast

On white

8.36

#4237BD on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.51

#4237BD on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4237BD

8.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4237BD	#FFFFFF	#000000	##FFFFFF
##4237BD	1.00	8.36	2.51	8.36
#FFFFFF	8.36	1.00	21.00	1.00
#000000	2.51	21.00	1.00	21.00
##FFFFFF	8.36	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053C1

Deuteranopia (green-blind)

#0048BB

Tritanopia (blue-blind)

#005C76

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #4237bd;
/* rgb */ color: rgb(66, 55, 189);
/* oklch */ color: oklch(44.2% 0.200 278.0);

Tailwind

colors: {
  custom: {
    50: '#866fd2',
    500: '#4237bd',
    950: '#000000',
  },
}

SCSS

$custom: #4237bd;
$custom-light: #866fd2;
$custom-dark: #000000;

JSON

{
  "hex": "#4237bd",
  "rgb": {
    "r": 66,
    "g": 55,
    "b": 189
  },
  "hsl": {
    "h": 244.925,
    "s": 54.918,
    "l": 47.843
  },
  "oklch": {
    "l": 0.44207,
    "c": 0.19998,
    "h": 278
  },
  "luminance": 0.07565
}

Semantic roles & 50–950 ramp

primary

#4237BD

secondary

#C4C986

accent

#DE4AD2

background

#F8F6FD

surface

#F0ECFA

border

#CBC7D3

text

#0D0714

muted

#7D7A83

Preview Lab

Preview with #4237BD

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

Preview Lab → · Contrast checker → · Palette generator →