#3138B0#3138B0

#3138B0 is a dark, vivid blue. Relative luminance 0.066; OKLCH L 42.0% C 0.187 H 272.6°. Best body text is #FFFFFF at 9.04:1 contrast (WCAG AA passes).

Color values

HEX	#3138B0
RGB	rgb(49, 56, 176)
HSL	hsl(237, 56%, 44%)
HSV	hsv(237, 72%, 69%)
CMYK	cmyk(72.2%, 68.2%, 0%, 31%)
CIE-LAB	lab(30.91, 37.81, -64.46)
CIE-LCH	lch(30.91, 74.73, 300.40°)
OKLab	oklab(42% 0.0083 -0.1864)
OKLCH	oklch(42% 0.187 272.6)
XYZ	xyz(10.5146, 6.6149, 41.7885)
Luminance	0.0662 (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

#3138B0 #B0A931

analogous

#3178B0 #3138B0 #6A31B0

triadic

#3138B0 #B03138 #38B031

tetradic

#3138B0 #B03178 #B0A931 #31B06A

square

#3138B0 #B03178 #B0A931 #31B06A

split-complementary

#3138B0 #B06A31 #78B031

monochromatic

#161A50 #242980 #3138B0 #5057CE #8085DC

Accessibility & contrast

On white

9.04

#3138B0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.32

#3138B0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3138B0

9.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3138B0	#FFFFFF	#000000	##FFFFFF
##3138B0	1.00	9.04	2.32	9.04
#FFFFFF	9.04	1.00	21.00	1.00
#000000	2.32	21.00	1.00	21.00
##FFFFFF	9.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FB4

Deuteranopia (green-blind)

#0043AE

Tritanopia (blue-blind)

#00586F

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #3138b0;
/* rgb */ color: rgb(49, 56, 176);
/* oklch */ color: oklch(42.0% 0.187 272.6);

Tailwind

colors: {
  custom: {
    50: '#7c6fc9',
    500: '#3138b0',
    950: '#000000',
  },
}

SCSS

$custom: #3138b0;
$custom-light: #7c6fc9;
$custom-dark: #000000;

JSON

{
  "hex": "#3138b0",
  "rgb": {
    "r": 49,
    "g": 56,
    "b": 176
  },
  "hsl": {
    "h": 236.693,
    "s": 56.444,
    "l": 44.118
  },
  "oklch": {
    "l": 0.41997,
    "c": 0.18655,
    "h": 272.6
  },
  "luminance": 0.06616
}

Semantic roles & 50–950 ramp

primary

#3138B0

secondary

#C5C078

accent

#D748E0

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #3138B0

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

Preview Lab → · Contrast checker → · Palette generator →