#1C43B3#1C43B3

#1C43B3 is a dark, vivid blue. Relative luminance 0.075; OKLCH L 43.3% C 0.183 H 264.8°. Best body text is #FFFFFF at 8.39:1 contrast (WCAG AA passes).

Color values

HEX	#1C43B3
RGB	rgb(28, 67, 179)
HSL	hsl(225, 73%, 41%)
HSV	hsv(225, 84%, 70%)
CMYK	cmyk(84.4%, 62.6%, 0%, 29.8%)
CIE-LAB	lab(32.95, 29.83, -62.94)
CIE-LCH	lch(32.95, 69.65, 295.36°)
OKLab	oklab(43.32% -0.0167 -0.1822)
OKLCH	oklch(43.32% 0.183 264.8)
XYZ	xyz(10.6198, 7.5145, 43.5298)
Luminance	0.0752 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C43B3 #B38C1C

analogous

#1C8FB3 #1C43B3 #401CB3

triadic

#1C43B3 #B31C43 #43B31C

tetradic

#1C43B3 #B31C8F #B38C1C #1CB340

square

#1C43B3 #B31C8F #B38C1C #1CB340

split-complementary

#1C43B3 #B3401C #8FB31C

monochromatic

#0B1B49 #142F7E #1C43B3 #2E5BDE #6385E7

Accessibility & contrast

On white

8.39

#1C43B3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.50

#1C43B3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C43B3

8.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C43B3	#FFFFFF	#000000	##FFFFFF
##1C43B3	1.00	8.39	2.50	8.39
#FFFFFF	8.39	1.00	21.00	1.00
#000000	2.50	21.00	1.00	21.00
##FFFFFF	8.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0055B7

Deuteranopia (green-blind)

#0047B1

Tritanopia (blue-blind)

#006074

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #1c43b3;
/* rgb */ color: rgb(28, 67, 179);
/* oklch */ color: oklch(43.3% 0.183 264.8);

Tailwind

colors: {
  custom: {
    50: '#7576cb',
    500: '#1c43b3',
    950: '#000000',
  },
}

SCSS

$custom: #1c43b3;
$custom-light: #7576cb;
$custom-dark: #000000;

JSON

{
  "hex": "#1c43b3",
  "rgb": {
    "r": 28,
    "g": 67,
    "b": 179
  },
  "hsl": {
    "h": 224.503,
    "s": 72.947,
    "l": 40.588
  },
  "oklch": {
    "l": 0.43321,
    "c": 0.18298,
    "h": 264.8
  },
  "luminance": 0.07516
}

Semantic roles & 50–950 ramp

primary

#1C43B3

secondary

#CBAF5F

accent

#C038F0

background

#F7F7FC

surface

#EEEDF9

border

#C9C8D2

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #1C43B3

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

Preview Lab → · Contrast checker → · Palette generator →