#31397B#31397B

#31397B is a dark, moderate blue. Relative luminance 0.050; OKLCH L 37.6% C 0.111 H 274.5°. Best body text is #FFFFFF at 10.49:1 contrast (WCAG AA passes).

Color values

HEX	#31397B
RGB	rgb(49, 57, 123)
HSL	hsl(234, 43%, 34%)
HSV	hsv(234, 60%, 48%)
CMYK	cmyk(60.2%, 53.7%, 0%, 51.8%)
CIE-LAB	lab(26.76, 18.08, -38.76)
CIE-LCH	lch(26.76, 42.77, 295.01°)
OKLab	oklab(37.56% 0.0088 -0.1109)
OKLCH	oklch(37.56% 0.111 274.5)
XYZ	xyz(6.3037, 5.0088, 19.3697)
Luminance	0.0501 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#31397B #7B7331

analogous

#315E7B #31397B #4E317B

triadic

#31397B #7B3139 #397B31

tetradic

#31397B #7B315E #7B7331 #317B4E

square

#31397B #7B315E #7B7331 #317B4E

split-complementary

#31397B #7B4E31 #5E7B31

monochromatic

#0E1023 #20254F #31397B #424DA7 #656FC2

Accessibility & contrast

On white

10.49

#31397B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.00

#31397B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #31397B

10.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##31397B	#FFFFFF	#000000	##FFFFFF
##31397B	1.00	10.49	2.00	10.49
#FFFFFF	10.49	1.00	21.00	1.00
#000000	2.00	21.00	1.00	21.00
##FFFFFF	10.49	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#14437D

Deuteranopia (green-blind)

#043C7A

Tritanopia (blue-blind)

#004854

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #31397b;
/* rgb */ color: rgb(49, 57, 123);
/* oklch */ color: oklch(37.6% 0.111 274.5);

Tailwind

colors: {
  custom: {
    50: '#706fa2',
    500: '#31397b',
    950: '#000000',
  },
}

SCSS

$custom: #31397b;
$custom-light: #706fa2;
$custom-dark: #000000;

JSON

{
  "hex": "#31397b",
  "rgb": {
    "r": 49,
    "g": 57,
    "b": 123
  },
  "hsl": {
    "h": 233.514,
    "s": 43.023,
    "l": 33.725
  },
  "oklch": {
    "l": 0.37559,
    "c": 0.11125,
    "h": 274.5
  },
  "luminance": 0.05009
}

Semantic roles & 50–950 ramp

primary

#31397B

secondary

#A9A15F

accent

#C555D3

background

#F7F6FA

surface

#EDECF3

border

#C8C7CD

text

#08070F

muted

#7B7A7F

Preview Lab

Preview with #31397B

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

Preview Lab → · Contrast checker → · Palette generator →