#1F17A0#1F17A0

#1F17A0 is a dark, highly saturated blue. Relative luminance 0.034; OKLCH L 34.7% C 0.203 H 271.1°. Best body text is #FFFFFF at 12.44:1 contrast (WCAG AA passes).

Color values

HEX	#1F17A0
RGB	rgb(31, 23, 160)
HSL	hsl(244, 75%, 36%)
HSV	hsv(244, 86%, 63%)
CMYK	cmyk(80.6%, 85.6%, 0%, 37.3%)
CIE-LAB	lab(21.73, 49.07, -70.01)
CIE-LCH	lch(21.73, 85.49, 305.03°)
OKLab	oklab(34.7% 0.0038 -0.2025)
OKLCH	oklch(34.7% 0.203 271.1)
XYZ	xyz(7.2145, 3.4413, 33.5349)
Luminance	0.0344 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F17A0 #98A017

analogous

#1753A0 #1F17A0 #6317A0

triadic

#1F17A0 #A01F17 #17A01F

tetradic

#1F17A0 #A01753 #98A017 #17A063

square

#1F17A0 #A01753 #98A017 #17A063

split-complementary

#1F17A0 #A06317 #53A017

monochromatic

#0A0835 #150F6A #1F17A0 #291FD6 #554CE5

Accessibility & contrast

On white

12.44

#1F17A0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.69

#1F17A0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F17A0

12.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F17A0	#FFFFFF	#000000	##FFFFFF
##1F17A0	1.00	12.44	1.69	12.44
#FFFFFF	12.44	1.00	21.00	1.00
#000000	1.69	21.00	1.00	21.00
##FFFFFF	12.44	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003BA4

Deuteranopia (green-blind)

#002D9E

Tritanopia (blue-blind)

#00455E

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #1f17a0;
/* rgb */ color: rgb(31, 23, 160);
/* oklch */ color: oklch(34.7% 0.203 271.1);

Tailwind

colors: {
  custom: {
    50: '#755abe',
    500: '#1f17a0',
    950: '#000000',
  },
}

SCSS

$custom: #1f17a0;
$custom-light: #755abe;
$custom-dark: #000000;

JSON

{
  "hex": "#1f17a0",
  "rgb": {
    "r": 31,
    "g": 23,
    "b": 160
  },
  "hsl": {
    "h": 243.504,
    "s": 74.863,
    "l": 35.882
  },
  "oklch": {
    "l": 0.34704,
    "c": 0.20259,
    "h": 271.1
  },
  "luminance": 0.03442
}

Semantic roles & 50–950 ramp

primary

#1F17A0

secondary

#C0C74C

accent

#F136E7

background

#F7F5FB

surface

#EEE9F7

border

#C9C5D0

text

#0A0412

muted

#7C7981

Preview Lab

Preview with #1F17A0

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

Preview Lab → · Contrast checker → · Palette generator →