#4039BC#4039BC

#4039BC is a dark, vivid blue. Relative luminance 0.076; OKLCH L 44.3% C 0.197 H 277.0°. Best body text is #FFFFFF at 8.30:1 contrast (WCAG AA passes).

Color values

HEX	#4039BC
RGB	rgb(64, 57, 188)
HSL	hsl(243, 53%, 48%)
HSV	hsv(243, 70%, 74%)
CMYK	cmyk(66%, 69.7%, 0%, 26.3%)
CIE-LAB	lab(33.23, 43.08, -67.72)
CIE-LCH	lch(33.23, 80.26, 302.46°)
OKLab	oklab(44.27% 0.0242 -0.1955)
OKLCH	oklch(44.27% 0.197 277)
XYZ	xyz(12.6516, 7.6460, 48.3763)
Luminance	0.0765 (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

#4039BC #B5BC39

analogous

#3973BC #4039BC #8139BC

triadic

#4039BC #BC4039 #39BC40

tetradic

#4039BC #BC3973 #B5BC39 #39BC81

square

#4039BC #BC3973 #B5BC39 #39BC81

split-complementary

#4039BC #BC8139 #73BC39

monochromatic

#201D5E #302B8D #4039BC #6863D0 #9692DE

Accessibility & contrast

On white

8.30

#4039BC on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.53

#4039BC on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4039BC

8.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4039BC	#FFFFFF	#000000	##FFFFFF
##4039BC	1.00	8.30	2.53	8.30
#FFFFFF	8.30	1.00	21.00	1.00
#000000	2.53	21.00	1.00	21.00
##FFFFFF	8.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054C0

Deuteranopia (green-blind)

#0049BA

Tritanopia (blue-blind)

#005D76

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #4039bc;
/* rgb */ color: rgb(64, 57, 188);
/* oklch */ color: oklch(44.3% 0.197 277.0);

Tailwind

colors: {
  custom: {
    50: '#8571d1',
    500: '#4039bc',
    950: '#000000',
  },
}

SCSS

$custom: #4039bc;
$custom-light: #8571d1;
$custom-dark: #000000;

JSON

{
  "hex": "#4039bc",
  "rgb": {
    "r": 64,
    "g": 57,
    "b": 188
  },
  "hsl": {
    "h": 243.206,
    "s": 53.469,
    "l": 48.039
  },
  "oklch": {
    "l": 0.44268,
    "c": 0.19701,
    "h": 277
  },
  "luminance": 0.07647
}

Semantic roles & 50–950 ramp

primary

#4039BC

secondary

#C5C988

accent

#DD4BD5

background

#F8F6FD

surface

#F0ECFA

border

#CBC7D3

text

#0C0814

muted

#7D7B83

Preview Lab

Preview with #4039BC

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

Preview Lab → · Contrast checker → · Palette generator →