#313DBB#313DBB

#313DBB is a dark, vivid blue. Relative luminance 0.076; OKLCH L 43.9% C 0.195 H 271.2°. Best body text is #FFFFFF at 8.35:1 contrast (WCAG AA passes).

Color values

HEX	#313DBB
RGB	rgb(49, 61, 187)
HSL	hsl(235, 58%, 46%)
HSV	hsv(235, 74%, 73%)
CMYK	cmyk(73.8%, 67.4%, 0%, 26.7%)
CIE-LAB	lab(33.09, 38.57, -67.41)
CIE-LCH	lch(33.09, 77.67, 299.78°)
OKLab	oklab(43.88% 0.0042 -0.195)
OKLCH	oklch(43.88% 0.195 271.2)
XYZ	xyz(11.9020, 7.5771, 47.8393)
Luminance	0.0758 (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

#313DBB #BBAF31

analogous

#3182BB #313DBB #6A31BB

triadic

#313DBB #BB313D #3DBB31

tetradic

#313DBB #BB3182 #BBAF31 #31BB6A

square

#313DBB #BB3182 #BBAF31 #31BB6A

split-complementary

#313DBB #BB6A31 #82BB31

monochromatic

#181D5A #242D8B #313DBB #5661D3 #878FE0

Accessibility & contrast

On white

8.35

#313DBB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.52

#313DBB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313DBB

8.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313DBB	#FFFFFF	#000000	##FFFFFF
##313DBB	1.00	8.35	2.52	8.35
#FFFFFF	8.35	1.00	21.00	1.00
#000000	2.52	21.00	1.00	21.00
##FFFFFF	8.35	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054BF

Deuteranopia (green-blind)

#0047B9

Tritanopia (blue-blind)

#005F77

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #313dbb;
/* rgb */ color: rgb(49, 61, 187);
/* oklch */ color: oklch(43.9% 0.195 271.2);

Tailwind

colors: {
  custom: {
    50: '#7e73d1',
    500: '#313dbb',
    950: '#000000',
  },
}

SCSS

$custom: #313dbb;
$custom-light: #7e73d1;
$custom-dark: #000000;

JSON

{
  "hex": "#313dbb",
  "rgb": {
    "r": 49,
    "g": 61,
    "b": 187
  },
  "hsl": {
    "h": 234.783,
    "s": 58.475,
    "l": 46.275
  },
  "oklch": {
    "l": 0.43884,
    "c": 0.19503,
    "h": 271.2
  },
  "luminance": 0.07578
}

Semantic roles & 50–950 ramp

primary

#313DBB

secondary

#C9C37F

accent

#D446E2

background

#F8F7FD

surface

#F0EDFA

border

#CBC8D3

text

#0B0814

muted

#7C7B83

Preview Lab

Preview with #313DBB

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

Preview Lab → · Contrast checker → · Palette generator →