#313AB3#313AB3

#313AB3 is a dark, vivid blue. Relative luminance 0.069; OKLCH L 42.6% C 0.188 H 272.1°. Best body text is #FFFFFF at 8.80:1 contrast (WCAG AA passes).

Color values

HEX	#313AB3
RGB	rgb(49, 58, 179)
HSL	hsl(236, 57%, 45%)
HSV	hsv(236, 73%, 70%)
CMYK	cmyk(72.6%, 67.6%, 0%, 29.8%)
CIE-LAB	lab(31.65, 37.62, -65.03)
CIE-LCH	lch(31.65, 75.13, 300.05°)
OKLab	oklab(42.62% 0.0068 -0.188)
OKLCH	oklch(42.62% 0.188 272.1)
XYZ	xyz(10.9136, 6.9326, 43.4021)
Luminance	0.0693 (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

#313AB3 #B3AA31

analogous

#317BB3 #313AB3 #6931B3

triadic

#313AB3 #B3313A #3AB331

tetradic

#313AB3 #B3317B #B3AA31 #31B369

square

#313AB3 #B3317B #B3AA31 #31B369

split-complementary

#313AB3 #B36931 #7BB331

monochromatic

#171B53 #242A83 #313AB3 #525AD0 #8288DD

Accessibility & contrast

On white

8.80

#313AB3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.39

#313AB3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313AB3

8.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313AB3	#FFFFFF	#000000	##FFFFFF
##313AB3	1.00	8.80	2.39	8.80
#FFFFFF	8.80	1.00	21.00	1.00
#000000	2.39	21.00	1.00	21.00
##FFFFFF	8.80	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051B7

Deuteranopia (green-blind)

#0044B1

Tritanopia (blue-blind)

#005B71

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #313ab3;
/* rgb */ color: rgb(49, 58, 179);
/* oklch */ color: oklch(42.6% 0.188 272.1);

Tailwind

colors: {
  custom: {
    50: '#7c70cb',
    500: '#313ab3',
    950: '#000000',
  },
}

SCSS

$custom: #313ab3;
$custom-light: #7c70cb;
$custom-dark: #000000;

JSON

{
  "hex": "#313ab3",
  "rgb": {
    "r": 49,
    "g": 58,
    "b": 179
  },
  "hsl": {
    "h": 235.846,
    "s": 57.018,
    "l": 44.706
  },
  "oklch": {
    "l": 0.42618,
    "c": 0.18814,
    "h": 272.1
  },
  "luminance": 0.06934
}

Semantic roles & 50–950 ramp

primary

#313AB3

secondary

#C6C17A

accent

#D648E0

background

#F8F6FC

surface

#EFECF9

border

#CAC7D2

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #313AB3

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

Preview Lab → · Contrast checker → · Palette generator →