#1C17A0#1C17A0

#1C17A0 is a dark, highly saturated blue. Relative luminance 0.034; OKLCH L 34.5% C 0.203 H 270.1°. Best body text is #FFFFFF at 12.50:1 contrast (WCAG AA passes).

Color values

HEX	#1C17A0
RGB	rgb(28, 23, 160)
HSL	hsl(242, 75%, 36%)
HSV	hsv(242, 86%, 63%)
CMYK	cmyk(82.5%, 85.6%, 0%, 37.3%)
CIE-LAB	lab(21.57, 48.92, -70.29)
CIE-LCH	lch(21.57, 85.64, 304.84°)
OKLab	oklab(34.55% 0.0004 -0.2034)
OKLCH	oklch(34.55% 0.203 270.1)
XYZ	xyz(7.1283, 3.3969, 33.5309)
Luminance	0.0340 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C17A0 #9BA017

analogous

#1756A0 #1C17A0 #6017A0

triadic

#1C17A0 #A01C17 #17A01C

tetradic

#1C17A0 #A01756 #9BA017 #17A060

square

#1C17A0 #A01756 #9BA017 #17A060

split-complementary

#1C17A0 #A06017 #56A017

monochromatic

#090835 #130F6A #1C17A0 #251FD6 #524CE5

Accessibility & contrast

On white

12.50

#1C17A0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.68

#1C17A0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C17A0

12.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C17A0	#FFFFFF	#000000	##FFFFFF
##1C17A0	1.00	12.50	1.68	12.50
#FFFFFF	12.50	1.00	21.00	1.00
#000000	1.68	21.00	1.00	21.00
##FFFFFF	12.50	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003AA4

Deuteranopia (green-blind)

#002C9E

Tritanopia (blue-blind)

#00455E

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #1c17a0;
/* rgb */ color: rgb(28, 23, 160);
/* oklch */ color: oklch(34.5% 0.203 270.1);

Tailwind

colors: {
  custom: {
    50: '#7459be',
    500: '#1c17a0',
    950: '#000000',
  },
}

SCSS

$custom: #1c17a0;
$custom-light: #7459be;
$custom-dark: #000000;

JSON

{
  "hex": "#1c17a0",
  "rgb": {
    "r": 28,
    "g": 23,
    "b": 160
  },
  "hsl": {
    "h": 242.19,
    "s": 74.863,
    "l": 35.882
  },
  "oklch": {
    "l": 0.34547,
    "c": 0.2034,
    "h": 270.1
  },
  "luminance": 0.03398
}

Semantic roles & 50–950 ramp

primary

#1C17A0

secondary

#C3C74C

accent

#F136EB

background

#F7F5FB

surface

#EEE9F7

border

#C9C5D0

text

#0A0412

muted

#7C7981

Preview Lab

Preview with #1C17A0

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

Preview Lab → · Contrast checker → · Palette generator →