#4139BB#4139BB

#4139BB is a dark, vivid blue. Relative luminance 0.076; OKLCH L 44.2% C 0.196 H 277.5°. Best body text is #FFFFFF at 8.31:1 contrast (WCAG AA passes).

Color values

HEX	#4139BB
RGB	rgb(65, 57, 187)
HSL	hsl(244, 53%, 48%)
HSV	hsv(244, 70%, 73%)
CMYK	cmyk(65.2%, 69.5%, 0%, 26.7%)
CIE-LAB	lab(33.21, 42.88, -67.16)
CIE-LCH	lch(33.21, 79.68, 302.55°)
OKLab	oklab(44.25% 0.0256 -0.1939)
OKLCH	oklch(44.25% 0.196 277.5)
XYZ	xyz(12.6098, 7.6369, 47.8136)
Luminance	0.0764 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Ocean Blue

#4F42B5

ΔE00 2.97

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4139BB #B3BB39

analogous

#3972BB #4139BB #8239BB

triadic

#4139BB #BB4139 #39BB41

tetradic

#4139BB #BB3972 #B3BB39 #39BB82

square

#4139BB #BB3972 #B3BB39 #39BB82

split-complementary

#4139BB #BB8239 #72BB39

monochromatic

#201C5D #312B8C #4139BB #6962CF #9691DD

Accessibility & contrast

On white

8.31

#4139BB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.53

#4139BB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4139BB

8.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4139BB	#FFFFFF	#000000	##FFFFFF
##4139BB	1.00	8.31	2.53	8.31
#FFFFFF	8.31	1.00	21.00	1.00
#000000	2.53	21.00	1.00	21.00
##FFFFFF	8.31	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053BF

Deuteranopia (green-blind)

#0049B9

Tritanopia (blue-blind)

#005C76

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #4139bb;
/* rgb */ color: rgb(65, 57, 187);
/* oklch */ color: oklch(44.2% 0.196 277.5);

Tailwind

colors: {
  custom: {
    50: '#8571d1',
    500: '#4139bb',
    950: '#000000',
  },
}

SCSS

$custom: #4139bb;
$custom-light: #8571d1;
$custom-dark: #000000;

JSON

{
  "hex": "#4139bb",
  "rgb": {
    "r": 65,
    "g": 57,
    "b": 187
  },
  "hsl": {
    "h": 243.692,
    "s": 53.279,
    "l": 47.843
  },
  "oklch": {
    "l": 0.44245,
    "c": 0.19554,
    "h": 277.5
  },
  "luminance": 0.07638
}

Semantic roles & 50–950 ramp

primary

#4139BB

secondary

#C4C887

accent

#DD4BD4

background

#F8F6FD

surface

#F0ECFA

border

#CBC7D3

text

#0C0814

muted

#7D7B83

Preview Lab

Preview with #4139BB

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

Preview Lab → · Contrast checker → · Palette generator →