#1C43A6#1C43A6

#1C43A6 is a dark, vivid blue. Relative luminance 0.070; OKLCH L 42.1% C 0.166 H 264.1°. Best body text is #FFFFFF at 8.74:1 contrast (WCAG AA passes).

Color values

HEX	#1C43A6
RGB	rgb(28, 67, 166)
HSL	hsl(223, 71%, 38%)
HSV	hsv(223, 83%, 65%)
CMYK	cmyk(83.1%, 59.6%, 0%, 34.9%)
CIE-LAB	lab(31.84, 24.76, -57.00)
CIE-LCH	lch(31.84, 62.14, 293.48°)
OKLab	oklab(42.15% -0.017 -0.1648)
OKLCH	oklch(42.15% 0.166 264.1)
XYZ	xyz(9.3665, 7.0132, 36.9290)
Luminance	0.0701 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C43A6 #A67F1C

analogous

#1C88A6 #1C43A6 #3A1CA6

triadic

#1C43A6 #A61C43 #43A61C

tetradic

#1C43A6 #A61C88 #A67F1C #1CA63A

square

#1C43A6 #A61C88 #A67F1C #1CA63A

split-complementary

#1C43A6 #A63A1C #88A61C

monochromatic

#0A193D #132E72 #1C43A6 #2558DA #5980E3

Accessibility & contrast

On white

8.74

#1C43A6 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.40

#1C43A6 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C43A6

8.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C43A6	#FFFFFF	#000000	##FFFFFF
##1C43A6	1.00	8.74	2.40	8.74
#FFFFFF	8.74	1.00	21.00	1.00
#000000	2.40	21.00	1.00	21.00
##FFFFFF	8.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051A9

Deuteranopia (green-blind)

#0045A4

Tritanopia (blue-blind)

#005C6E

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #1c43a6;
/* rgb */ color: rgb(28, 67, 166);
/* oklch */ color: oklch(42.1% 0.166 264.1);

Tailwind

colors: {
  custom: {
    50: '#7176c1',
    500: '#1c43a6',
    950: '#000000',
  },
}

SCSS

$custom: #1c43a6;
$custom-light: #7176c1;
$custom-dark: #000000;

JSON

{
  "hex": "#1c43a6",
  "rgb": {
    "r": 28,
    "g": 67,
    "b": 166
  },
  "hsl": {
    "h": 223.043,
    "s": 71.134,
    "l": 38.039
  },
  "oklch": {
    "l": 0.42146,
    "c": 0.16569,
    "h": 264.1
  },
  "luminance": 0.07014
}

Semantic roles & 50–950 ramp

primary

#1C43A6

secondary

#C7A757

accent

#BB3AEE

background

#F7F7FC

surface

#EDEDF8

border

#C8C8D1

text

#090812

muted

#7B7B81

Preview Lab

Preview with #1C43A6

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

Preview Lab → · Contrast checker → · Palette generator →