#31388B#31388B

#31388B is a dark, vivid blue. Relative luminance 0.053; OKLCH L 38.6% C 0.136 H 274.4°. Best body text is #FFFFFF at 10.15:1 contrast (WCAG AA passes).

Color values

HEX	#31388B
RGB	rgb(49, 56, 139)
HSL	hsl(235, 48%, 37%)
HSV	hsv(235, 65%, 55%)
CMYK	cmyk(64.7%, 59.7%, 0%, 45.5%)
CIE-LAB	lab(27.70, 24.58, -47.24)
CIE-LCH	lch(27.70, 53.25, 297.49°)
OKLab	oklab(38.64% 0.0105 -0.1359)
OKLCH	oklch(38.64% 0.136 274.4)
XYZ	xyz(7.3395, 5.3448, 25.0660)
Luminance	0.0534 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#31388B #8B8431

analogous

#31658B #31388B #57318B

triadic

#31388B #8B3138 #388B31

tetradic

#31388B #8B3165 #8B8431 #318B57

square

#31388B #8B3165 #8B8431 #318B57

split-complementary

#31388B #8B5731 #658B31

monochromatic

#111431 #21265E #31388B #414AB8 #6B73CB

Accessibility & contrast

On white

10.15

#31388B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.07

#31388B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #31388B

10.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##31388B	#FFFFFF	#000000	##FFFFFF
##31388B	1.00	10.15	2.07	10.15
#FFFFFF	10.15	1.00	21.00	1.00
#000000	2.07	21.00	1.00	21.00
##FFFFFF	10.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00458E

Deuteranopia (green-blind)

#003E89

Tritanopia (blue-blind)

#004C5C

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #31388b;
/* rgb */ color: rgb(49, 56, 139);
/* oklch */ color: oklch(38.6% 0.136 274.4);

Tailwind

colors: {
  custom: {
    50: '#746eae',
    500: '#31388b',
    950: '#000000',
  },
}

SCSS

$custom: #31388b;
$custom-light: #746eae;
$custom-dark: #000000;

JSON

{
  "hex": "#31388b",
  "rgb": {
    "r": 49,
    "g": 56,
    "b": 139
  },
  "hsl": {
    "h": 235.333,
    "s": 47.872,
    "l": 36.863
  },
  "oklch": {
    "l": 0.38642,
    "c": 0.13627,
    "h": 274.4
  },
  "luminance": 0.05345
}

Semantic roles & 50–950 ramp

primary

#31388B

secondary

#B2AC65

accent

#CD50D7

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#090710

muted

#7B7A7F

Preview Lab

Preview with #31388B

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

Preview Lab → · Contrast checker → · Palette generator →