#1C23A9#1C23A9

#1C23A9 is a dark, highly saturated blue. Relative luminance 0.043; OKLCH L 37.0% C 0.205 H 268.9°. Best body text is #FFFFFF at 11.27:1 contrast (WCAG AA passes).

Color values

HEX	#1C23A9
RGB	rgb(28, 35, 169)
HSL	hsl(237, 72%, 39%)
HSV	hsv(237, 83%, 66%)
CMYK	cmyk(83.4%, 79.3%, 0%, 33.7%)
CIE-LAB	lab(24.68, 45.94, -70.58)
CIE-LCH	lch(24.68, 84.22, 303.06°)
OKLab	oklab(37.03% -0.0038 -0.2045)
OKLCH	oklch(37.03% 0.205 268.9)
XYZ	xyz(8.2389, 4.3125, 37.9266)
Luminance	0.0431 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C23A9 #A9A21C

analogous

#1C69A9 #1C23A9 #5B1CA9

triadic

#1C23A9 #A91C23 #23A91C

tetradic

#1C23A9 #A91C69 #A9A21C #1CA95B

square

#1C23A9 #A91C69 #A9A21C #1CA95B

split-complementary

#1C23A9 #A95B1C #69A91C

monochromatic

#0B0D40 #131874 #1C23A9 #2730DB #5B62E4

Accessibility & contrast

On white

11.27

#1C23A9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.86

#1C23A9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C23A9

11.27:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C23A9	#FFFFFF	#000000	##FFFFFF
##1C23A9	1.00	11.27	1.86	11.27
#FFFFFF	11.27	1.00	21.00	1.00
#000000	1.86	21.00	1.00	21.00
##FFFFFF	11.27	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0042AD

Deuteranopia (green-blind)

#0033A7

Tritanopia (blue-blind)

#004D66

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #1c23a9;
/* rgb */ color: rgb(28, 35, 169);
/* oklch */ color: oklch(37.0% 0.205 268.9);

Tailwind

colors: {
  custom: {
    50: '#7560c4',
    500: '#1c23a9',
    950: '#000000',
  },
}

SCSS

$custom: #1c23a9;
$custom-light: #7560c4;
$custom-dark: #000000;

JSON

{
  "hex": "#1c23a9",
  "rgb": {
    "r": 28,
    "g": 35,
    "b": 169
  },
  "hsl": {
    "h": 237.021,
    "s": 71.574,
    "l": 38.627
  },
  "oklch": {
    "l": 0.37029,
    "c": 0.20453,
    "h": 268.9
  },
  "luminance": 0.04314
}

Semantic roles & 50–950 ramp

primary

#1C23A9

secondary

#C8C259

accent

#E539EE

background

#F7F5FC

surface

#EEEAF8

border

#C9C6D1

text

#0A0513

muted

#7C7982

Preview Lab

Preview with #1C23A9

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

Preview Lab → · Contrast checker → · Palette generator →