#313F8E#313F8E

#313F8E is a dark, vivid blue. Relative luminance 0.062; OKLCH L 40.3% C 0.131 H 271.7°. Best body text is #FFFFFF at 9.41:1 contrast (WCAG AA passes).

Color values

HEX	#313F8E
RGB	rgb(49, 63, 142)
HSL	hsl(231, 49%, 37%)
HSV	hsv(231, 65%, 56%)
CMYK	cmyk(65.5%, 55.6%, 0%, 44.3%)
CIE-LAB	lab(29.81, 20.96, -45.66)
CIE-LCH	lch(29.81, 50.24, 294.66°)
OKLab	oklab(40.3% 0.0038 -0.1311)
OKLCH	oklch(40.3% 0.131 271.7)
XYZ	xyz(7.9250, 6.1603, 26.3574)
Luminance	0.0616 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313F8E #8E8031

analogous

#316D8E #313F8E #52318E

triadic

#313F8E #8E313F #3F8E31

tetradic

#313F8E #8E316D #8E8031 #318E52

square

#313F8E #8E316D #8E8031 #318E52

split-complementary

#313F8E #8E5231 #6D8E31

monochromatic

#121733 #212B61 #313F8E #4153BB #6D7BCD

Accessibility & contrast

On white

9.41

#313F8E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.23

#313F8E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313F8E

9.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313F8E	#FFFFFF	#000000	##FFFFFF
##313F8E	1.00	9.41	2.23	9.41
#FFFFFF	9.41	1.00	21.00	1.00
#000000	2.23	21.00	1.00	21.00
##FFFFFF	9.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#054B91

Deuteranopia (green-blind)

#00428C

Tritanopia (blue-blind)

#005260

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #313f8e;
/* rgb */ color: rgb(49, 63, 142);
/* oklch */ color: oklch(40.3% 0.131 271.7);

Tailwind

colors: {
  custom: {
    50: '#7473b0',
    500: '#313f8e',
    950: '#000000',
  },
}

SCSS

$custom: #313f8e;
$custom-light: #7473b0;
$custom-dark: #000000;

JSON

{
  "hex": "#313f8e",
  "rgb": {
    "r": 49,
    "g": 63,
    "b": 142
  },
  "hsl": {
    "h": 230.968,
    "s": 48.691,
    "l": 37.451
  },
  "oklch": {
    "l": 0.40297,
    "c": 0.13119,
    "h": 271.7
  },
  "luminance": 0.06161
}

Semantic roles & 50–950 ramp

primary

#313F8E

secondary

#B4A867

accent

#C450D8

background

#F7F7FA

surface

#EDEDF5

border

#C8C8CF

text

#090810

muted

#7B7B7F

Preview Lab

Preview with #313F8E

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

Preview Lab → · Contrast checker → · Palette generator →