#3138B1#3138B1

#3138B1 is a dark, vivid blue. Relative luminance 0.067; OKLCH L 42.1% C 0.188 H 272.5°. Best body text is #FFFFFF at 9.01:1 contrast (WCAG AA passes).

Color values

HEX	#3138B1
RGB	rgb(49, 56, 177)
HSL	hsl(237, 57%, 44%)
HSV	hsv(237, 72%, 69%)
CMYK	cmyk(72.3%, 68.4%, 0%, 30.6%)
CIE-LAB	lab(31.01, 38.16, -64.90)
CIE-LCH	lch(31.01, 75.29, 300.45°)
OKLab	oklab(42.09% 0.0082 -0.1876)
OKLCH	oklch(42.09% 0.188 272.5)
XYZ	xyz(10.6139, 6.6546, 42.3115)
Luminance	0.0666 (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

#3138B1 #B1AA31

analogous

#3178B1 #3138B1 #6A31B1

triadic

#3138B1 #B13138 #38B131

tetradic

#3138B1 #B13178 #B1AA31 #31B16A

square

#3138B1 #B13178 #B1AA31 #31B16A

split-complementary

#3138B1 #B16A31 #78B131

monochromatic

#161A51 #242981 #3138B1 #5157CF #8085DC

Accessibility & contrast

On white

9.01

#3138B1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.33

#3138B1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3138B1

9.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3138B1	#FFFFFF	#000000	##FFFFFF
##3138B1	1.00	9.01	2.33	9.01
#FFFFFF	9.01	1.00	21.00	1.00
#000000	2.33	21.00	1.00	21.00
##FFFFFF	9.01	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FB5

Deuteranopia (green-blind)

#0043AF

Tritanopia (blue-blind)

#005970

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #3138b1;
/* rgb */ color: rgb(49, 56, 177);
/* oklch */ color: oklch(42.1% 0.188 272.5);

Tailwind

colors: {
  custom: {
    50: '#7c6fc9',
    500: '#3138b1',
    950: '#000000',
  },
}

SCSS

$custom: #3138b1;
$custom-light: #7c6fc9;
$custom-dark: #000000;

JSON

{
  "hex": "#3138b1",
  "rgb": {
    "r": 49,
    "g": 56,
    "b": 177
  },
  "hsl": {
    "h": 236.719,
    "s": 56.637,
    "l": 44.314
  },
  "oklch": {
    "l": 0.42093,
    "c": 0.18783,
    "h": 272.5
  },
  "luminance": 0.06656
}

Semantic roles & 50–950 ramp

primary

#3138B1

secondary

#C5C179

accent

#D848E0

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #3138B1

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

Preview Lab → · Contrast checker → · Palette generator →