#313C8F#313C8F

#313C8F is a dark, vivid blue. Relative luminance 0.059; OKLCH L 39.8% C 0.137 H 272.8°. Best body text is #FFFFFF at 9.66:1 contrast (WCAG AA passes).

Color values

HEX	#313C8F
RGB	rgb(49, 60, 143)
HSL	hsl(233, 49%, 38%)
HSV	hsv(233, 66%, 56%)
CMYK	cmyk(65.7%, 58%, 0%, 43.9%)
CIE-LAB	lab(29.07, 23.35, -47.47)
CIE-LCH	lch(29.07, 52.90, 296.19°)
OKLab	oklab(39.77% 0.0068 -0.1365)
OKLCH	oklch(39.77% 0.137 272.8)
XYZ	xyz(7.8388, 5.8672, 26.7007)
Luminance	0.0587 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313C8F #8F8431

analogous

#316B8F #313C8F #55318F

triadic

#313C8F #8F313C #3C8F31

tetradic

#313C8F #8F316B #8F8431 #318F55

square

#313C8F #8F316B #8F8431 #318F55

split-complementary

#313C8F #8F5531 #6B8F31

monochromatic

#121634 #212961 #313C8F #414FBD #6D79CD

Accessibility & contrast

On white

9.66

#313C8F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.17

#313C8F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313C8F

9.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313C8F	#FFFFFF	#000000	##FFFFFF
##313C8F	1.00	9.66	2.17	9.66
#FFFFFF	9.66	1.00	21.00	1.00
#000000	2.17	21.00	1.00	21.00
##FFFFFF	9.66	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004992

Deuteranopia (green-blind)

#00408D

Tritanopia (blue-blind)

#00505F

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #313c8f;
/* rgb */ color: rgb(49, 60, 143);
/* oklch */ color: oklch(39.8% 0.137 272.8);

Tailwind

colors: {
  custom: {
    50: '#7471b0',
    500: '#313c8f',
    950: '#000000',
  },
}

SCSS

$custom: #313c8f;
$custom-light: #7471b0;
$custom-dark: #000000;

JSON

{
  "hex": "#313c8f",
  "rgb": {
    "r": 49,
    "g": 60,
    "b": 143
  },
  "hsl": {
    "h": 232.979,
    "s": 48.958,
    "l": 37.647
  },
  "oklch": {
    "l": 0.39768,
    "c": 0.13666,
    "h": 272.8
  },
  "luminance": 0.05868
}

Semantic roles & 50–950 ramp

primary

#313C8F

secondary

#B5AC67

accent

#C84FD9

background

#F7F6FA

surface

#EDECF5

border

#C8C7CF

text

#090711

muted

#7B7A80

Preview Lab

Preview with #313C8F

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

Preview Lab → · Contrast checker → · Palette generator →