#1F108D#1F108D

#1F108D is a dark, vivid blue. Relative luminance 0.026; OKLCH L 31.7% C 0.185 H 273.2°. Best body text is #FFFFFF at 13.84:1 contrast (WCAG AA passes).

Color values

HEX	#1F108D
RGB	rgb(31, 16, 141)
HSL	hsl(247, 80%, 31%)
HSV	hsv(247, 89%, 55%)
CMYK	cmyk(78%, 88.7%, 0%, 44.7%)
CIE-LAB	lab(18.30, 46.23, -63.99)
CIE-LCH	lch(18.30, 78.94, 305.85°)
OKLab	oklab(31.65% 0.0105 -0.185)
OKLCH	oklch(31.65% 0.185 273.2)
XYZ	xyz(5.5565, 2.5844, 25.4001)
Luminance	0.0259 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F108D #7E8D10

analogous

#103F8D #1F108D #5D108D

triadic

#1F108D #8D1F10 #108D1F

tetradic

#1F108D #8D103F #7E8D10 #108D5D

square

#1F108D #8D103F #7E8D10 #108D5D

split-complementary

#1F108D #8D5D10 #3F8D10

monochromatic

#07041F #130A56 #1F108D #2B16C4 #4630E7

Accessibility & contrast

On white

13.84

#1F108D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.52

#1F108D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F108D

13.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F108D	#FFFFFF	#000000	##FFFFFF
##1F108D	1.00	13.84	1.52	13.84
#FFFFFF	13.84	1.00	21.00	1.00
#000000	1.52	21.00	1.00	21.00
##FFFFFF	13.84	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003290

Deuteranopia (green-blind)

#00278B

Tritanopia (blue-blind)

#003B52

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #1f108d;
/* rgb */ color: rgb(31, 16, 141);
/* oklch */ color: oklch(31.7% 0.185 273.2);

Tailwind

colors: {
  custom: {
    50: '#7055b0',
    500: '#1f108d',
    950: '#000000',
  },
}

SCSS

$custom: #1f108d;
$custom-light: #7055b0;
$custom-dark: #000000;

JSON

{
  "hex": "#1f108d",
  "rgb": {
    "r": 31,
    "g": 16,
    "b": 141
  },
  "hsl": {
    "h": 247.2,
    "s": 79.618,
    "l": 30.784
  },
  "oklch": {
    "l": 0.31652,
    "c": 0.18528,
    "h": 273.2
  },
  "luminance": 0.02585
}

Semantic roles & 50–950 ramp

primary

#1F108D

secondary

#B1C237

accent

#F632DF

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#090311

muted

#7B7880

Preview Lab

Preview with #1F108D

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

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