#3138B2#3138B2

#3138B2 is a dark, vivid blue. Relative luminance 0.067; OKLCH L 42.2% C 0.189 H 272.5°. Best body text is #FFFFFF at 8.98:1 contrast (WCAG AA passes).

Color values

HEX	#3138B2
RGB	rgb(49, 56, 178)
HSL	hsl(237, 57%, 45%)
HSV	hsv(237, 72%, 70%)
CMYK	cmyk(72.5%, 68.5%, 0%, 30.2%)
CIE-LAB	lab(31.10, 38.51, -65.34)
CIE-LCH	lch(31.10, 75.84, 300.51°)
OKLab	oklab(42.19% 0.0081 -0.1889)
OKLCH	oklch(42.19% 0.189 272.5)
XYZ	xyz(10.7140, 6.6946, 42.8384)
Luminance	0.0670 (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

#3138B2 #B2AB31

analogous

#3179B2 #3138B2 #6B31B2

triadic

#3138B2 #B23138 #38B231

tetradic

#3138B2 #B23179 #B2AB31 #31B26B

square

#3138B2 #B23179 #B2AB31 #31B26B

split-complementary

#3138B2 #B26B31 #79B231

monochromatic

#171A52 #242982 #3138B2 #5158CF #8186DC

Accessibility & contrast

On white

8.98

#3138B2 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.34

#3138B2 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3138B2

8.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3138B2	#FFFFFF	#000000	##FFFFFF
##3138B2	1.00	8.98	2.34	8.98
#FFFFFF	8.98	1.00	21.00	1.00
#000000	2.34	21.00	1.00	21.00
##FFFFFF	8.98	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FB6

Deuteranopia (green-blind)

#0043B0

Tritanopia (blue-blind)

#005970

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #3138b2;
/* rgb */ color: rgb(49, 56, 178);
/* oklch */ color: oklch(42.2% 0.189 272.5);

Tailwind

colors: {
  custom: {
    50: '#7c6fca',
    500: '#3138b2',
    950: '#000000',
  },
}

SCSS

$custom: #3138b2;
$custom-light: #7c6fca;
$custom-dark: #000000;

JSON

{
  "hex": "#3138b2",
  "rgb": {
    "r": 49,
    "g": 56,
    "b": 178
  },
  "hsl": {
    "h": 236.744,
    "s": 56.828,
    "l": 44.51
  },
  "oklch": {
    "l": 0.4219,
    "c": 0.18911,
    "h": 272.5
  },
  "luminance": 0.06696
}

Semantic roles & 50–950 ramp

primary

#3138B2

secondary

#C5C179

accent

#D848E0

background

#F8F6FC

surface

#EFECF9

border

#CAC7D2

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #3138B2

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

Preview Lab → · Contrast checker → · Palette generator →