#313CBB#313CBB

#313CBB is a dark, vivid blue. Relative luminance 0.075; OKLCH L 43.7% C 0.196 H 271.4°. Best body text is #FFFFFF at 8.42:1 contrast (WCAG AA passes).

Color values

HEX	#313CBB
RGB	rgb(49, 60, 187)
HSL	hsl(235, 58%, 46%)
HSV	hsv(235, 74%, 73%)
CMYK	cmyk(73.8%, 67.9%, 0%, 26.7%)
CIE-LAB	lab(32.86, 39.19, -67.79)
CIE-LCH	lch(32.86, 78.30, 300.03°)
OKLab	oklab(43.72% 0.0048 -0.1961)
OKLCH	oklch(43.72% 0.196 271.4)
XYZ	xyz(11.8491, 7.4713, 47.8217)
Luminance	0.0747 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313CBB #BBB031

analogous

#3181BB #313CBB #6B31BB

triadic

#313CBB #BB313C #3CBB31

tetradic

#313CBB #BB3181 #BBB031 #31BB6B

square

#313CBB #BB3181 #BBB031 #31BB6B

split-complementary

#313CBB #BB6B31 #81BB31

monochromatic

#181D5A #242C8B #313CBB #5660D3 #878EE0

Accessibility & contrast

On white

8.42

#313CBB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.49

#313CBB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313CBB

8.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313CBB	#FFFFFF	#000000	##FFFFFF
##313CBB	1.00	8.42	2.49	8.42
#FFFFFF	8.42	1.00	21.00	1.00
#000000	2.49	21.00	1.00	21.00
##FFFFFF	8.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054BF

Deuteranopia (green-blind)

#0047B9

Tritanopia (blue-blind)

#005E76

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #313cbb;
/* rgb */ color: rgb(49, 60, 187);
/* oklch */ color: oklch(43.7% 0.196 271.4);

Tailwind

colors: {
  custom: {
    50: '#7e72d1',
    500: '#313cbb',
    950: '#000000',
  },
}

SCSS

$custom: #313cbb;
$custom-light: #7e72d1;
$custom-dark: #000000;

JSON

{
  "hex": "#313cbb",
  "rgb": {
    "r": 49,
    "g": 60,
    "b": 187
  },
  "hsl": {
    "h": 235.217,
    "s": 58.475,
    "l": 46.275
  },
  "oklch": {
    "l": 0.43718,
    "c": 0.19615,
    "h": 271.4
  },
  "luminance": 0.07473
}

Semantic roles & 50–950 ramp

primary

#313CBB

secondary

#C9C37F

accent

#D546E2

background

#F8F6FD

surface

#F0ECFA

border

#CBC7D3

text

#0B0814

muted

#7C7B83

Preview Lab

Preview with #313CBB

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

Preview Lab → · Contrast checker → · Palette generator →