#1C1FA9#1C1FA9

#1C1FA9 is a dark, highly saturated blue. Relative luminance 0.041; OKLCH L 36.5% C 0.208 H 269.2°. Best body text is #FFFFFF at 11.55:1 contrast (WCAG AA passes).

Color values

HEX	#1C1FA9
RGB	rgb(28, 31, 169)
HSL	hsl(239, 72%, 39%)
HSV	hsv(239, 83%, 66%)
CMYK	cmyk(83.4%, 81.7%, 0%, 33.7%)
CIE-LAB	lab(23.97, 48.01, -71.76)
CIE-LCH	lch(23.97, 86.34, 303.78°)
OKLab	oklab(36.53% -0.003 -0.2078)
OKLCH	oklch(36.53% 0.208 269.2)
XYZ	xyz(8.1279, 4.0904, 37.8896)
Luminance	0.0409 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C1FA9 #A9A61C

analogous

#1C65A9 #1C1FA9 #5F1CA9

triadic

#1C1FA9 #A91C1F #1FA91C

tetradic

#1C1FA9 #A91C65 #A9A61C #1CA95F

square

#1C1FA9 #A91C65 #A9A61C #1CA95F

split-complementary

#1C1FA9 #A95F1C #65A91C

monochromatic

#0B0C40 #131574 #1C1FA9 #272BDB #5B5EE4

Accessibility & contrast

On white

11.55

#1C1FA9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.82

#1C1FA9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C1FA9

11.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C1FA9	#FFFFFF	#000000	##FFFFFF
##1C1FA9	1.00	11.55	1.82	11.55
#FFFFFF	11.55	1.00	21.00	1.00
#000000	1.82	21.00	1.00	21.00
##FFFFFF	11.55	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0040AD

Deuteranopia (green-blind)

#0031A7

Tritanopia (blue-blind)

#004B65

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #1c1fa9;
/* rgb */ color: rgb(28, 31, 169);
/* oklch */ color: oklch(36.5% 0.208 269.2);

Tailwind

colors: {
  custom: {
    50: '#765ec4',
    500: '#1c1fa9',
    950: '#000000',
  },
}

SCSS

$custom: #1c1fa9;
$custom-light: #765ec4;
$custom-dark: #000000;

JSON

{
  "hex": "#1c1fa9",
  "rgb": {
    "r": 28,
    "g": 31,
    "b": 169
  },
  "hsl": {
    "h": 238.723,
    "s": 71.574,
    "l": 38.627
  },
  "oklch": {
    "l": 0.36532,
    "c": 0.20785,
    "h": 269.2
  },
  "luminance": 0.04091
}

Semantic roles & 50–950 ramp

primary

#1C1FA9

secondary

#C8C559

accent

#EA39EE

background

#F8F5FC

surface

#EFE9F8

border

#CAC5D1

text

#0A0513

muted

#7C7982

Preview Lab

Preview with #1C1FA9

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

Preview Lab → · Contrast checker → · Palette generator →