#311F8D#311F8D

#311F8D is a dark, vivid blue. Relative luminance 0.036; OKLCH L 34.7% C 0.169 H 280.4°. Best body text is #FFFFFF at 12.27:1 contrast (WCAG AA passes).

Color values

HEX	#311F8D
RGB	rgb(49, 31, 141)
HSL	hsl(250, 64%, 34%)
HSV	hsv(250, 78%, 55%)
CMYK	cmyk(65.2%, 78%, 0%, 44.7%)
CIE-LAB	lab(22.14, 40.71, -57.57)
CIE-LCH	lch(22.14, 70.51, 305.27°)
OKLab	oklab(34.68% 0.0305 -0.1661)
OKLCH	oklch(34.68% 0.169 280.4)
XYZ	xyz(6.5628, 3.5555, 25.5346)
Luminance	0.0356 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#311F8D #7B8D1F

analogous

#1F448D #311F8D #681F8D

triadic

#311F8D #8D311F #1F8D31

tetradic

#311F8D #8D1F44 #7B8D1F #1F8D68

square

#311F8D #8D1F44 #7B8D1F #1F8D68

split-complementary

#311F8D #8D681F #448D1F

monochromatic

#0E0929 #20145B #311F8D #422ABF #654ED8

Accessibility & contrast

On white

12.27

#311F8D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.71

#311F8D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #311F8D

12.27:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##311F8D	#FFFFFF	#000000	##FFFFFF
##311F8D	1.00	12.27	1.71	12.27
#FFFFFF	12.27	1.00	21.00	1.00
#000000	1.71	21.00	1.00	21.00
##FFFFFF	12.27	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003990

Deuteranopia (green-blind)

#00318B

Tritanopia (blue-blind)

#003F55

Achromatopsia (no color)

#353535

Design tokens & code

CSS

--color: #311f8d;
/* rgb */ color: rgb(49, 31, 141);
/* oklch */ color: oklch(34.7% 0.169 280.4);

Tailwind

colors: {
  custom: {
    50: '#765eaf',
    500: '#311f8d',
    950: '#000000',
  },
}

SCSS

$custom: #311f8d;
$custom-light: #765eaf;
$custom-dark: #000000;

JSON

{
  "hex": "#311f8d",
  "rgb": {
    "r": 49,
    "g": 31,
    "b": 141
  },
  "hsl": {
    "h": 249.818,
    "s": 63.953,
    "l": 33.725
  },
  "oklch": {
    "l": 0.34682,
    "c": 0.16892,
    "h": 280.4
  },
  "luminance": 0.03556
}

Semantic roles & 50–950 ramp

primary

#311F8D

secondary

#A9BB4D

accent

#E741CC

background

#F7F5FA

surface

#EEE9F5

border

#C9C5CF

text

#0A0411

muted

#7C7980

Preview Lab

Preview with #311F8D

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

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