#313C8B#313C8B

#313C8B is a dark, vivid blue. Relative luminance 0.057; OKLCH L 39.4% C 0.131 H 272.9°. Best body text is #FFFFFF at 9.77:1 contrast (WCAG AA passes).

Color values

HEX	#313C8B
RGB	rgb(49, 60, 139)
HSL	hsl(233, 48%, 37%)
HSV	hsv(233, 65%, 55%)
CMYK	cmyk(64.7%, 56.8%, 0%, 45.5%)
CIE-LAB	lab(28.77, 21.89, -45.50)
CIE-LCH	lch(28.77, 50.49, 295.69°)
OKLab	oklab(39.44% 0.0066 -0.1307)
OKLCH	oklch(39.44% 0.131 272.9)
XYZ	xyz(7.5411, 5.7481, 25.1332)
Luminance	0.0575 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313C8B #8B8031

analogous

#31698B #313C8B #53318B

triadic

#313C8B #8B313C #3C8B31

tetradic

#313C8B #8B3169 #8B8031 #318B53

square

#313C8B #8B3169 #8B8031 #318B53

split-complementary

#313C8B #8B5331 #698B31

monochromatic

#111531 #21285E #313C8B #4150B8 #6B77CB

Accessibility & contrast

On white

9.77

#313C8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.15

#313C8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313C8B

9.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313C8B	#FFFFFF	#000000	##FFFFFF
##313C8B	1.00	9.77	2.15	9.77
#FFFFFF	9.77	1.00	21.00	1.00
#000000	2.15	21.00	1.00	21.00
##FFFFFF	9.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00488E

Deuteranopia (green-blind)

#004089

Tritanopia (blue-blind)

#004F5D

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #313c8b;
/* rgb */ color: rgb(49, 60, 139);
/* oklch */ color: oklch(39.4% 0.131 272.9);

Tailwind

colors: {
  custom: {
    50: '#7371ad',
    500: '#313c8b',
    950: '#000000',
  },
}

SCSS

$custom: #313c8b;
$custom-light: #7371ad;
$custom-dark: #000000;

JSON

{
  "hex": "#313c8b",
  "rgb": {
    "r": 49,
    "g": 60,
    "b": 139
  },
  "hsl": {
    "h": 232.667,
    "s": 47.872,
    "l": 36.863
  },
  "oklch": {
    "l": 0.39442,
    "c": 0.13087,
    "h": 272.9
  },
  "luminance": 0.05749
}

Semantic roles & 50–950 ramp

primary

#313C8B

secondary

#B2A965

accent

#C750D7

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#090710

muted

#7B7A7F

Preview Lab

Preview with #313C8B

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

Preview Lab → · Contrast checker → · Palette generator →