#4239BB#4239BB

#4239BB is a dark, vivid blue. Relative luminance 0.077; OKLCH L 44.3% C 0.195 H 277.9°. Best body text is #FFFFFF at 8.29:1 contrast (WCAG AA passes).

Color values

HEX	#4239BB
RGB	rgb(66, 57, 187)
HSL	hsl(244, 53%, 48%)
HSV	hsv(244, 70%, 73%)
CMYK	cmyk(64.7%, 69.5%, 0%, 26.7%)
CIE-LAB	lab(33.29, 43.01, -67.04)
CIE-LCH	lch(33.29, 79.65, 302.68°)
OKLab	oklab(44.32% 0.0269 -0.1935)
OKLCH	oklch(44.32% 0.195 277.9)
XYZ	xyz(12.6766, 7.6713, 47.8168)
Luminance	0.0767 (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

#4239BB #B2BB39

analogous

#3971BB #4239BB #8339BB

triadic

#4239BB #BB4239 #39BB42

tetradic

#4239BB #BB3971 #B2BB39 #39BB83

square

#4239BB #BB3971 #B2BB39 #39BB83

split-complementary

#4239BB #BB8339 #71BB39

monochromatic

#211C5D #312B8C #4239BB #6A62CF #9691DD

Accessibility & contrast

On white

8.29

#4239BB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.53

#4239BB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4239BB

8.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4239BB	#FFFFFF	#000000	##FFFFFF
##4239BB	1.00	8.29	2.53	8.29
#FFFFFF	8.29	1.00	21.00	1.00
#000000	2.53	21.00	1.00	21.00
##FFFFFF	8.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054BF

Deuteranopia (green-blind)

#0049B9

Tritanopia (blue-blind)

#005C76

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #4239bb;
/* rgb */ color: rgb(66, 57, 187);
/* oklch */ color: oklch(44.3% 0.195 277.9);

Tailwind

colors: {
  custom: {
    50: '#8571d1',
    500: '#4239bb',
    950: '#000000',
  },
}

SCSS

$custom: #4239bb;
$custom-light: #8571d1;
$custom-dark: #000000;

JSON

{
  "hex": "#4239bb",
  "rgb": {
    "r": 66,
    "g": 57,
    "b": 187
  },
  "hsl": {
    "h": 244.154,
    "s": 53.279,
    "l": 47.843
  },
  "oklch": {
    "l": 0.44317,
    "c": 0.19533,
    "h": 277.9
  },
  "luminance": 0.07672
}

Semantic roles & 50–950 ramp

primary

#4239BB

secondary

#C4C887

accent

#DD4BD3

background

#F8F6FD

surface

#F0ECFA

border

#CBC7D3

text

#0C0814

muted

#7D7B83

Preview Lab

Preview with #4239BB

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

Preview Lab → · Contrast checker → · Palette generator →