#31428B#31428B

#31428B is a dark, vivid blue. Relative luminance 0.064; OKLCH L 40.7% C 0.123 H 270.3°. Best body text is #FFFFFF at 9.20:1 contrast (WCAG AA passes).

Color values

HEX	#31428B
RGB	rgb(49, 66, 139)
HSL	hsl(229, 48%, 37%)
HSV	hsv(229, 65%, 55%)
CMYK	cmyk(64.7%, 52.5%, 0%, 45.5%)
CIE-LAB	lab(30.43, 17.83, -42.81)
CIE-LCH	lch(30.43, 46.38, 292.61°)
OKLab	oklab(40.69% 0.0006 -0.1227)
OKLCH	oklch(40.69% 0.123 270.3)
XYZ	xyz(7.8735, 6.4128, 25.2440)
Luminance	0.0641 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#31428B #8B7A31

analogous

#316F8B #31428B #4D318B

triadic

#31428B #8B3142 #428B31

tetradic

#31428B #8B316F #8B7A31 #318B4D

square

#31428B #8B316F #8B7A31 #318B4D

split-complementary

#31428B #8B4D31 #6F8B31

monochromatic

#111731 #212D5E #31428B #4157B8 #6B7DCB

Accessibility & contrast

On white

9.20

#31428B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.28

#31428B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #31428B

9.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##31428B	#FFFFFF	#000000	##FFFFFF
##31428B	1.00	9.20	2.28	9.20
#FFFFFF	9.20	1.00	21.00	1.00
#000000	2.28	21.00	1.00	21.00
##FFFFFF	9.20	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#184C8E

Deuteranopia (green-blind)

#004489

Tritanopia (blue-blind)

#005360

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #31428b;
/* rgb */ color: rgb(49, 66, 139);
/* oklch */ color: oklch(40.7% 0.123 270.3);

Tailwind

colors: {
  custom: {
    50: '#7376ad',
    500: '#31428b',
    950: '#000000',
  },
}

SCSS

$custom: #31428b;
$custom-light: #7376ad;
$custom-dark: #000000;

JSON

{
  "hex": "#31428b",
  "rgb": {
    "r": 49,
    "g": 66,
    "b": 139
  },
  "hsl": {
    "h": 228.667,
    "s": 47.872,
    "l": 36.863
  },
  "oklch": {
    "l": 0.40693,
    "c": 0.12272,
    "h": 270.3
  },
  "luminance": 0.06413
}

Semantic roles & 50–950 ramp

primary

#31428B

secondary

#B2A465

accent

#BE50D7

background

#F7F7FA

surface

#EDEDF4

border

#C8C8CE

text

#090810

muted

#7B7B7F

Preview Lab

Preview with #31428B

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

Preview Lab → · Contrast checker → · Palette generator →