#4237BC#4237BC

#4237BC is a dark, vivid blue. Relative luminance 0.075; OKLCH L 44.1% C 0.199 H 278.1°. Best body text is #FFFFFF at 8.39:1 contrast (WCAG AA passes).

Color values

HEX	#4237BC
RGB	rgb(66, 55, 188)
HSL	hsl(245, 55%, 48%)
HSV	hsv(245, 71%, 74%)
CMYK	cmyk(64.9%, 70.7%, 0%, 26.3%)
CIE-LAB	lab(32.96, 44.48, -68.16)
CIE-LCH	lch(32.96, 81.39, 303.13°)
OKLab	oklab(44.11% 0.0281 -0.1967)
OKLCH	oklch(44.11% 0.199 278.1)
XYZ	xyz(12.6871, 7.5204, 48.3502)
Luminance	0.0752 (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

#4237BC #B1BC37

analogous

#376FBC #4237BC #8437BC

triadic

#4237BC #BC4237 #37BC42

tetradic

#4237BC #BC376F #B1BC37 #37BC84

square

#4237BC #BC376F #B1BC37 #37BC84

split-complementary

#4237BC #BC8437 #6FBC37

monochromatic

#211B5D #31298D #4237BC #6960D0 #968FDE

Accessibility & contrast

On white

8.39

#4237BC on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.50

#4237BC on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4237BC

8.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4237BC	#FFFFFF	#000000	##FFFFFF
##4237BC	1.00	8.39	2.50	8.39
#FFFFFF	8.39	1.00	21.00	1.00
#000000	2.50	21.00	1.00	21.00
##FFFFFF	8.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053C0

Deuteranopia (green-blind)

#0048BA

Tritanopia (blue-blind)

#005B75

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #4237bc;
/* rgb */ color: rgb(66, 55, 188);
/* oklch */ color: oklch(44.1% 0.199 278.1);

Tailwind

colors: {
  custom: {
    50: '#866fd1',
    500: '#4237bc',
    950: '#000000',
  },
}

SCSS

$custom: #4237bc;
$custom-light: #866fd1;
$custom-dark: #000000;

JSON

{
  "hex": "#4237bc",
  "rgb": {
    "r": 66,
    "g": 55,
    "b": 188
  },
  "hsl": {
    "h": 244.962,
    "s": 54.733,
    "l": 47.647
  },
  "oklch": {
    "l": 0.44112,
    "c": 0.19875,
    "h": 278.1
  },
  "luminance": 0.07521
}

Semantic roles & 50–950 ramp

primary

#4237BC

secondary

#C3C986

accent

#DE4AD2

background

#F8F6FD

surface

#F0ECFA

border

#CBC7D3

text

#0C0714

muted

#7D7A83

Preview Lab

Preview with #4237BC

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

Preview Lab → · Contrast checker → · Palette generator →