#313F78#313F78

#313F78 is a dark, moderate blue. Relative luminance 0.056; OKLCH L 38.6% C 0.098 H 270.8°. Best body text is #FFFFFF at 9.94:1 contrast (WCAG AA passes).

Color values

HEX	#313F78
RGB	rgb(49, 63, 120)
HSL	hsl(228, 42%, 33%)
HSV	hsv(228, 59%, 47%)
CMYK	cmyk(59.2%, 47.5%, 0%, 52.9%)
CIE-LAB	lab(28.28, 12.89, -34.42)
CIE-LCH	lch(28.28, 36.76, 290.53°)
OKLab	oklab(38.65% 0.0014 -0.0981)
OKLCH	oklch(38.65% 0.098 270.8)
XYZ	xyz(6.4332, 5.5636, 18.5005)
Luminance	0.0556 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313F78 #786A31

analogous

#316278 #313F78 #463178

triadic

#313F78 #78313F #3F7831

tetradic

#313F78 #783162 #786A31 #317846

square

#313F78 #783162 #786A31 #317846

split-complementary

#313F78 #784631 #627831

monochromatic

#0E1121 #1F284D #313F78 #4356A3 #6476C0

Accessibility & contrast

On white

9.94

#313F78 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.11

#313F78 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313F78

9.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313F78	#FFFFFF	#000000	##FFFFFF
##313F78	1.00	9.94	2.11	9.94
#FFFFFF	9.94	1.00	21.00	1.00
#000000	2.11	21.00	1.00	21.00
##FFFFFF	9.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#25467A

Deuteranopia (green-blind)

#1B4077

Tritanopia (blue-blind)

#044C55

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #313f78;
/* rgb */ color: rgb(49, 63, 120);
/* oklch */ color: oklch(38.6% 0.098 270.8);

Tailwind

colors: {
  custom: {
    50: '#6f739f',
    500: '#313f78',
    950: '#000000',
  },
}

SCSS

$custom: #313f78;
$custom-light: #6f739f;
$custom-dark: #000000;

JSON

{
  "hex": "#313f78",
  "rgb": {
    "r": 49,
    "g": 63,
    "b": 120
  },
  "hsl": {
    "h": 228.169,
    "s": 42.012,
    "l": 33.137
  },
  "oklch": {
    "l": 0.38649,
    "c": 0.0981,
    "h": 270.8
  },
  "luminance": 0.05564
}

Semantic roles & 50–950 ramp

primary

#313F78

secondary

#A7995E

accent

#B956D2

background

#F7F6F9

surface

#EDECF2

border

#C8C7CC

text

#08080E

muted

#7B7B7E

Preview Lab

Preview with #313F78

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

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