#3138B5#3138B5

#3138B5 is a dark, vivid blue. Relative luminance 0.068; OKLCH L 42.5% C 0.193 H 272.3°. Best body text is #FFFFFF at 8.88:1 contrast (WCAG AA passes).

Color values

HEX	#3138B5
RGB	rgb(49, 56, 181)
HSL	hsl(237, 57%, 45%)
HSV	hsv(237, 73%, 71%)
CMYK	cmyk(72.9%, 69.1%, 0%, 29%)
CIE-LAB	lab(31.39, 39.55, -66.66)
CIE-LCH	lch(31.39, 77.51, 300.68°)
OKLab	oklab(42.48% 0.0078 -0.1928)
OKLCH	oklch(42.48% 0.193 272.3)
XYZ	xyz(11.0185, 6.8164, 44.4421)
Luminance	0.0682 (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

#3138B5 #B5AE31

analogous

#317AB5 #3138B5 #6C31B5

triadic

#3138B5 #B53138 #38B531

tetradic

#3138B5 #B5317A #B5AE31 #31B56C

square

#3138B5 #B5317A #B5AE31 #31B56C

split-complementary

#3138B5 #B56C31 #7AB531

monochromatic

#171A55 #242985 #3138B5 #5359D0 #8388DD

Accessibility & contrast

On white

8.88

#3138B5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.36

#3138B5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3138B5

8.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3138B5	#FFFFFF	#000000	##FFFFFF
##3138B5	1.00	8.88	2.36	8.88
#FFFFFF	8.88	1.00	21.00	1.00
#000000	2.36	21.00	1.00	21.00
##FFFFFF	8.88	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050B9

Deuteranopia (green-blind)

#0044B3

Tritanopia (blue-blind)

#005A72

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #3138b5;
/* rgb */ color: rgb(49, 56, 181);
/* oklch */ color: oklch(42.5% 0.193 272.3);

Tailwind

colors: {
  custom: {
    50: '#7d6fcc',
    500: '#3138b5',
    950: '#000000',
  },
}

SCSS

$custom: #3138b5;
$custom-light: #7d6fcc;
$custom-dark: #000000;

JSON

{
  "hex": "#3138b5",
  "rgb": {
    "r": 49,
    "g": 56,
    "b": 181
  },
  "hsl": {
    "h": 236.818,
    "s": 57.391,
    "l": 45.098
  },
  "oklch": {
    "l": 0.42481,
    "c": 0.19295,
    "h": 272.3
  },
  "luminance": 0.06818
}

Semantic roles & 50–950 ramp

primary

#3138B5

secondary

#C7C37B

accent

#D847E1

background

#F8F6FC

surface

#EFECF9

border

#CAC7D2

text

#0B0714

muted

#7C7A82

Preview Lab

Preview with #3138B5

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

Preview Lab → · Contrast checker → · Palette generator →