#4137BB#4137BB

#4137BB is a dark, vivid blue. Relative luminance 0.074; OKLCH L 43.9% C 0.198 H 277.8°. Best body text is #FFFFFF at 8.44:1 contrast (WCAG AA passes).

Color values

HEX	#4137BB
RGB	rgb(65, 55, 187)
HSL	hsl(245, 55%, 47%)
HSV	hsv(245, 71%, 73%)
CMYK	cmyk(65.2%, 70.6%, 0%, 26.7%)
CIE-LAB	lab(32.79, 44.03, -67.85)
CIE-LCH	lch(32.79, 80.89, 302.98°)
OKLab	oklab(43.94% 0.027 -0.1959)
OKLCH	oklch(43.94% 0.198 277.8)
XYZ	xyz(12.5129, 7.4430, 47.7813)
Luminance	0.0744 (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

#4137BB #B1BB37

analogous

#376FBB #4137BB #8337BB

triadic

#4137BB #BB4137 #37BB41

tetradic

#4137BB #BB376F #B1BB37 #37BB83

square

#4137BB #BB376F #B1BB37 #37BB83

split-complementary

#4137BB #BB8337 #6FBB37

monochromatic

#201B5C #31298C #4137BB #685FD0 #958EDE

Accessibility & contrast

On white

8.44

#4137BB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.49

#4137BB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4137BB

8.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4137BB	#FFFFFF	#000000	##FFFFFF
##4137BB	1.00	8.44	2.49	8.44
#FFFFFF	8.44	1.00	21.00	1.00
#000000	2.49	21.00	1.00	21.00
##FFFFFF	8.44	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052BF

Deuteranopia (green-blind)

#0048B9

Tritanopia (blue-blind)

#005B75

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #4137bb;
/* rgb */ color: rgb(65, 55, 187);
/* oklch */ color: oklch(43.9% 0.198 277.8);

Tailwind

colors: {
  custom: {
    50: '#856fd1',
    500: '#4137bb',
    950: '#000000',
  },
}

SCSS

$custom: #4137bb;
$custom-light: #856fd1;
$custom-dark: #000000;

JSON

{
  "hex": "#4137bb",
  "rgb": {
    "r": 65,
    "g": 55,
    "b": 187
  },
  "hsl": {
    "h": 244.545,
    "s": 54.545,
    "l": 47.451
  },
  "oklch": {
    "l": 0.43944,
    "c": 0.19772,
    "h": 277.8
  },
  "luminance": 0.07444
}

Semantic roles & 50–950 ramp

primary

#4137BB

secondary

#C3C985

accent

#DE4AD3

background

#F8F6FD

surface

#F0ECFA

border

#CBC7D3

text

#0C0714

muted

#7D7A83

Preview Lab

Preview with #4137BB

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

Preview Lab → · Contrast checker → · Palette generator →