#31398B#31398B

#31398B is a dark, vivid blue. Relative luminance 0.054; OKLCH L 38.8% C 0.135 H 274.1°. Best body text is #FFFFFF at 10.05:1 contrast (WCAG AA passes).

Color values

HEX	#31398B
RGB	rgb(49, 57, 139)
HSL	hsl(235, 48%, 37%)
HSV	hsv(235, 65%, 55%)
CMYK	cmyk(64.7%, 59%, 0%, 45.5%)
CIE-LAB	lab(27.96, 23.91, -46.81)
CIE-LCH	lch(27.96, 52.56, 297.05°)
OKLab	oklab(38.84% 0.0096 -0.1346)
OKLCH	oklch(38.84% 0.135 274.1)
XYZ	xyz(7.3884, 5.4427, 25.0823)
Luminance	0.0544 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#31398B #8B8331

analogous

#31668B #31398B #56318B

triadic

#31398B #8B3139 #398B31

tetradic

#31398B #8B3166 #8B8331 #318B56

square

#31398B #8B3166 #8B8331 #318B56

split-complementary

#31398B #8B5631 #668B31

monochromatic

#111431 #21265E #31398B #414CB8 #6B74CB

Accessibility & contrast

On white

10.05

#31398B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.09

#31398B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #31398B

10.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##31398B	#FFFFFF	#000000	##FFFFFF
##31398B	1.00	10.05	2.09	10.05
#FFFFFF	10.05	1.00	21.00	1.00
#000000	2.09	21.00	1.00	21.00
##FFFFFF	10.05	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00468E

Deuteranopia (green-blind)

#003E89

Tritanopia (blue-blind)

#004D5C

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #31398b;
/* rgb */ color: rgb(49, 57, 139);
/* oklch */ color: oklch(38.8% 0.135 274.1);

Tailwind

colors: {
  custom: {
    50: '#746fae',
    500: '#31398b',
    950: '#000000',
  },
}

SCSS

$custom: #31398b;
$custom-light: #746fae;
$custom-dark: #000000;

JSON

{
  "hex": "#31398b",
  "rgb": {
    "r": 49,
    "g": 57,
    "b": 139
  },
  "hsl": {
    "h": 234.667,
    "s": 47.872,
    "l": 36.863
  },
  "oklch": {
    "l": 0.38839,
    "c": 0.13492,
    "h": 274.1
  },
  "luminance": 0.05443
}

Semantic roles & 50–950 ramp

primary

#31398B

secondary

#B2AC65

accent

#CB50D7

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#090710

muted

#7B7A7F

Preview Lab

Preview with #31398B

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

Preview Lab → · Contrast checker → · Palette generator →