#313F80#313F80

#313F80 is a dark, moderate blue. Relative luminance 0.058; OKLCH L 39.2% C 0.110 H 271.3°. Best body text is #FFFFFF at 9.75:1 contrast (WCAG AA passes).

Color values

HEX	#313F80
RGB	rgb(49, 63, 128)
HSL	hsl(229, 45%, 35%)
HSV	hsv(229, 62%, 50%)
CMYK	cmyk(61.7%, 50.8%, 0%, 49.8%)
CIE-LAB	lab(28.81, 15.81, -38.59)
CIE-LCH	lch(28.81, 41.70, 292.28°)
OKLab	oklab(39.22% 0.0026 -0.1103)
OKLCH	oklch(39.22% 0.11 271.3)
XYZ	xyz(6.9391, 5.7659, 21.1652)
Luminance	0.0577 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313F80 #807231

analogous

#316780 #313F80 #4B3180

triadic

#313F80 #80313F #3F8031

tetradic

#313F80 #803167 #807231 #31804B

square

#313F80 #803167 #807231 #31804B

split-complementary

#313F80 #804B31 #678031

monochromatic

#0F1327 #202954 #313F80 #4255AC #6777C5

Accessibility & contrast

On white

9.75

#313F80 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.15

#313F80 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313F80

9.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313F80	#FFFFFF	#000000	##FFFFFF
##313F80	1.00	9.75	2.15	9.75
#FFFFFF	9.75	1.00	21.00	1.00
#000000	2.15	21.00	1.00	21.00
##FFFFFF	9.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1E4882

Deuteranopia (green-blind)

#0F417F

Tritanopia (blue-blind)

#004E59

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #313f80;
/* rgb */ color: rgb(49, 63, 128);
/* oklch */ color: oklch(39.2% 0.110 271.3);

Tailwind

colors: {
  custom: {
    50: '#7173a5',
    500: '#313f80',
    950: '#000000',
  },
}

SCSS

$custom: #313f80;
$custom-light: #7173a5;
$custom-dark: #000000;

JSON

{
  "hex": "#313f80",
  "rgb": {
    "r": 49,
    "g": 63,
    "b": 128
  },
  "hsl": {
    "h": 229.367,
    "s": 44.633,
    "l": 34.706
  },
  "oklch": {
    "l": 0.39224,
    "c": 0.11036,
    "h": 271.3
  },
  "luminance": 0.05766
}

Semantic roles & 50–950 ramp

primary

#313F80

secondary

#AC9F61

accent

#BE53D4

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#08080F

muted

#7B7B7F

Preview Lab

Preview with #313F80

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

Preview Lab → · Contrast checker → · Palette generator →