#31377B#31377B

#31377B is a dark, moderate blue. Relative luminance 0.048; OKLCH L 37.1% C 0.114 H 275.6°. Best body text is #FFFFFF at 10.70:1 contrast (WCAG AA passes).

Color values

HEX	#31377B
RGB	rgb(49, 55, 123)
HSL	hsl(235, 43%, 34%)
HSV	hsv(235, 60%, 48%)
CMYK	cmyk(60.2%, 55.3%, 0%, 51.8%)
CIE-LAB	lab(26.20, 19.45, -39.66)
CIE-LCH	lch(26.20, 44.17, 296.12°)
OKLab	oklab(37.14% 0.0111 -0.1136)
OKLCH	oklch(37.14% 0.114 275.6)
XYZ	xyz(6.2068, 4.8150, 19.3374)
Luminance	0.0481 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#31377B #7B7531

analogous

#315C7B #31377B #50317B

triadic

#31377B #7B3137 #377B31

tetradic

#31377B #7B315C #7B7531 #317B50

square

#31377B #7B315C #7B7531 #317B50

split-complementary

#31377B #7B5031 #5C7B31

monochromatic

#0E1023 #20234F #31377B #424BA7 #656CC2

Accessibility & contrast

On white

10.70

#31377B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.96

#31377B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #31377B

10.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##31377B	#FFFFFF	#000000	##FFFFFF
##31377B	1.00	10.70	1.96	10.70
#FFFFFF	10.70	1.00	21.00	1.00
#000000	1.96	21.00	1.00	21.00
##FFFFFF	10.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0E417D

Deuteranopia (green-blind)

#003B7A

Tritanopia (blue-blind)

#014753

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #31377b;
/* rgb */ color: rgb(49, 55, 123);
/* oklch */ color: oklch(37.1% 0.114 275.6);

Tailwind

colors: {
  custom: {
    50: '#706da2',
    500: '#31377b',
    950: '#000000',
  },
}

SCSS

$custom: #31377b;
$custom-light: #706da2;
$custom-dark: #000000;

JSON

{
  "hex": "#31377b",
  "rgb": {
    "r": 49,
    "g": 55,
    "b": 123
  },
  "hsl": {
    "h": 235.135,
    "s": 43.023,
    "l": 33.725
  },
  "oklch": {
    "l": 0.37139,
    "c": 0.11411,
    "h": 275.6
  },
  "luminance": 0.04815
}

Semantic roles & 50–950 ramp

primary

#31377B

secondary

#A9A35F

accent

#C955D3

background

#F7F6FA

surface

#EDEBF3

border

#C8C6CD

text

#08070F

muted

#7B7A7F

Preview Lab

Preview with #31377B

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

Preview Lab → · Contrast checker → · Palette generator →