#31509B#31509B

#31509B is a dark, vivid blue. Relative luminance 0.088; OKLCH L 44.9% C 0.128 H 264.8°. Best body text is #FFFFFF at 7.63:1 contrast (WCAG AA passes).

Color values

HEX	#31509B
RGB	rgb(49, 80, 155)
HSL	hsl(222, 52%, 40%)
HSV	hsv(222, 68%, 61%)
CMYK	cmyk(68.4%, 48.4%, 0%, 39.2%)
CIE-LAB	lab(35.51, 14.41, -44.39)
CIE-LCH	lch(35.51, 46.67, 287.98°)
OKLab	oklab(44.91% -0.0115 -0.1272)
OKLCH	oklch(44.91% 0.128 264.8)
XYZ	xyz(10.0496, 8.7559, 32.1644)
Luminance	0.0876 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#31509B #9B7C31

analogous

#31859B #31509B #47319B

triadic

#31509B #9B3150 #509B31

tetradic

#31509B #9B3185 #9B7C31 #319B47

square

#31509B #9B3185 #9B7C31 #319B47

split-complementary

#31509B #9B4731 #859B31

monochromatic

#14203E #22386D #31509B #456AC4 #738FD3

Accessibility & contrast

On white

7.63

#31509B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.75

#31509B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #31509B

7.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##31509B	#FFFFFF	#000000	##FFFFFF
##31509B	1.00	7.63	2.75	7.63
#FFFFFF	7.63	1.00	21.00	1.00
#000000	2.75	21.00	1.00	21.00
##FFFFFF	7.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#29599E

Deuteranopia (green-blind)

#114F99

Tritanopia (blue-blind)

#00616E

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #31509b;
/* rgb */ color: rgb(49, 80, 155);
/* oklch */ color: oklch(44.9% 0.128 264.8);

Tailwind

colors: {
  custom: {
    50: '#7580b9',
    500: '#31509b',
    950: '#000000',
  },
}

SCSS

$custom: #31509b;
$custom-light: #7580b9;
$custom-dark: #000000;

JSON

{
  "hex": "#31509b",
  "rgb": {
    "r": 49,
    "g": 80,
    "b": 155
  },
  "hsl": {
    "h": 222.453,
    "s": 51.961,
    "l": 40
  },
  "oklch": {
    "l": 0.44906,
    "c": 0.12767,
    "h": 264.8
  },
  "luminance": 0.08757
}

Semantic roles & 50–950 ramp

primary

#31509B

secondary

#BBA46D

accent

#B24CDB

background

#F7F7FB

surface

#EEEEF6

border

#C9C9D0

text

#090A11

muted

#7B7C80

Preview Lab

Preview with #31509B

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

Preview Lab → · Contrast checker → · Palette generator →