#313D80#313D80

#313D80 is a dark, moderate blue. Relative luminance 0.055; OKLCH L 38.8% C 0.113 H 272.4°. Best body text is #FFFFFF at 9.95:1 contrast (WCAG AA passes).

Color values

HEX	#313D80
RGB	rgb(49, 61, 128)
HSL	hsl(231, 45%, 35%)
HSV	hsv(231, 62%, 50%)
CMYK	cmyk(61.7%, 52.3%, 0%, 49.8%)
CIE-LAB	lab(28.24, 17.17, -39.51)
CIE-LCH	lch(28.24, 43.08, 293.49°)
OKLab	oklab(38.79% 0.0048 -0.1131)
OKLCH	oklch(38.79% 0.113 272.4)
XYZ	xyz(6.8304, 5.5484, 21.1289)
Luminance	0.0555 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313D80 #807431

analogous

#316580 #313D80 #4D3180

triadic

#313D80 #80313D #3D8031

tetradic

#313D80 #803165 #807431 #31804D

square

#313D80 #803165 #807431 #31804D

split-complementary

#313D80 #804D31 #658031

monochromatic

#0F1327 #202854 #313D80 #4252AC #6775C5

Accessibility & contrast

On white

9.95

#313D80 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.11

#313D80 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313D80

9.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313D80	#FFFFFF	#000000	##FFFFFF
##313D80	1.00	9.95	2.11	9.95
#FFFFFF	9.95	1.00	21.00	1.00
#000000	2.11	21.00	1.00	21.00
##FFFFFF	9.95	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#194682

Deuteranopia (green-blind)

#073F7F

Tritanopia (blue-blind)

#004C58

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #313d80;
/* rgb */ color: rgb(49, 61, 128);
/* oklch */ color: oklch(38.8% 0.113 272.4);

Tailwind

colors: {
  custom: {
    50: '#7172a5',
    500: '#313d80',
    950: '#000000',
  },
}

SCSS

$custom: #313d80;
$custom-light: #7172a5;
$custom-dark: #000000;

JSON

{
  "hex": "#313d80",
  "rgb": {
    "r": 49,
    "g": 61,
    "b": 128
  },
  "hsl": {
    "h": 230.886,
    "s": 44.633,
    "l": 34.706
  },
  "oklch": {
    "l": 0.38791,
    "c": 0.11316,
    "h": 272.4
  },
  "luminance": 0.05549
}

Semantic roles & 50–950 ramp

primary

#313D80

secondary

#ACA161

accent

#C153D4

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#08070F

muted

#7B7A7F

Preview Lab

Preview with #313D80

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

Preview Lab → · Contrast checker → · Palette generator →