#3138B3#3138B3

#3138B3 is a dark, vivid blue. Relative luminance 0.067; OKLCH L 42.3% C 0.190 H 272.4°. Best body text is #FFFFFF at 8.95:1 contrast (WCAG AA passes).

Color values

HEX	#3138B3
RGB	rgb(49, 56, 179)
HSL	hsl(237, 57%, 45%)
HSV	hsv(237, 73%, 70%)
CMYK	cmyk(72.6%, 68.7%, 0%, 29.8%)
CIE-LAB	lab(31.20, 38.86, -65.78)
CIE-LCH	lch(31.20, 76.40, 300.57°)
OKLab	oklab(42.29% 0.008 -0.1902)
OKLCH	oklch(42.29% 0.19 272.4)
XYZ	xyz(10.8147, 6.7349, 43.3691)
Luminance	0.0674 (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

#3138B3 #B3AC31

analogous

#3179B3 #3138B3 #6B31B3

triadic

#3138B3 #B33138 #38B331

tetradic

#3138B3 #B33179 #B3AC31 #31B36B

square

#3138B3 #B33179 #B3AC31 #31B36B

split-complementary

#3138B3 #B36B31 #79B331

monochromatic

#171A53 #242983 #3138B3 #5258D0 #8287DD

Accessibility & contrast

On white

8.95

#3138B3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.35

#3138B3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3138B3

8.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3138B3	#FFFFFF	#000000	##FFFFFF
##3138B3	1.00	8.95	2.35	8.95
#FFFFFF	8.95	1.00	21.00	1.00
#000000	2.35	21.00	1.00	21.00
##FFFFFF	8.95	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050B7

Deuteranopia (green-blind)

#0043B1

Tritanopia (blue-blind)

#005971

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #3138b3;
/* rgb */ color: rgb(49, 56, 179);
/* oklch */ color: oklch(42.3% 0.190 272.4);

Tailwind

colors: {
  custom: {
    50: '#7c6fcb',
    500: '#3138b3',
    950: '#000000',
  },
}

SCSS

$custom: #3138b3;
$custom-light: #7c6fcb;
$custom-dark: #000000;

JSON

{
  "hex": "#3138b3",
  "rgb": {
    "r": 49,
    "g": 56,
    "b": 179
  },
  "hsl": {
    "h": 236.769,
    "s": 57.018,
    "l": 44.706
  },
  "oklch": {
    "l": 0.42287,
    "c": 0.1904,
    "h": 272.4
  },
  "luminance": 0.06736
}

Semantic roles & 50–950 ramp

primary

#3138B3

secondary

#C6C27A

accent

#D848E0

background

#F8F6FC

surface

#EFECF9

border

#CAC7D2

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #3138B3

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

Preview Lab → · Contrast checker → · Palette generator →