#3138AB#3138AB

#3138AB is a dark, vivid blue. Relative luminance 0.064; OKLCH L 41.5% C 0.180 H 272.8°. Best body text is #FFFFFF at 9.19:1 contrast (WCAG AA passes).

Color values

HEX	#3138AB
RGB	rgb(49, 56, 171)
HSL	hsl(237, 55%, 43%)
HSV	hsv(237, 71%, 67%)
CMYK	cmyk(71.3%, 67.3%, 0%, 32.9%)
CIE-LAB	lab(30.45, 36.06, -62.23)
CIE-LCH	lch(30.45, 71.92, 300.09°)
OKLab	oklab(41.52% 0.0089 -0.1798)
OKLCH	oklch(41.52% 0.18 272.8)
XYZ	xyz(10.0290, 6.4206, 39.2309)
Luminance	0.0642 (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

#3138AB #ABA431

analogous

#3175AB #3138AB #6731AB

triadic

#3138AB #AB3138 #38AB31

tetradic

#3138AB #AB3175 #ABA431 #31AB67

square

#3138AB #AB3175 #ABA431 #31AB67

split-complementary

#3138AB #AB6731 #75AB31

monochromatic

#16194C #23287B #3138AB #4D54CC #7D82DA

Accessibility & contrast

On white

9.19

#3138AB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.28

#3138AB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3138AB

9.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3138AB	#FFFFFF	#000000	##FFFFFF
##3138AB	1.00	9.19	2.28	9.19
#FFFFFF	9.19	1.00	21.00	1.00
#000000	2.28	21.00	1.00	21.00
##FFFFFF	9.19	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004DAF

Deuteranopia (green-blind)

#0042A9

Tritanopia (blue-blind)

#00576C

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #3138ab;
/* rgb */ color: rgb(49, 56, 171);
/* oklch */ color: oklch(41.5% 0.180 272.8);

Tailwind

colors: {
  custom: {
    50: '#7b6fc5',
    500: '#3138ab',
    950: '#000000',
  },
}

SCSS

$custom: #3138ab;
$custom-light: #7b6fc5;
$custom-dark: #000000;

JSON

{
  "hex": "#3138ab",
  "rgb": {
    "r": 49,
    "g": 56,
    "b": 171
  },
  "hsl": {
    "h": 236.557,
    "s": 55.455,
    "l": 43.137
  },
  "oklch": {
    "l": 0.41518,
    "c": 0.18006,
    "h": 272.8
  },
  "luminance": 0.06422
}

Semantic roles & 50–950 ramp

primary

#3138AB

secondary

#C2BE75

accent

#D649DF

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #3138AB

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

Preview Lab → · Contrast checker → · Palette generator →