#1C42A8#1C42A8

#1C42A8 is a dark, vivid blue. Relative luminance 0.070; OKLCH L 42.1% C 0.170 H 264.5°. Best body text is #FFFFFF at 8.77:1 contrast (WCAG AA passes).

Color values

HEX	#1C42A8
RGB	rgb(28, 66, 168)
HSL	hsl(224, 71%, 38%)
HSV	hsv(224, 83%, 66%)
CMYK	cmyk(83.3%, 60.7%, 0%, 34.1%)
CIE-LAB	lab(31.74, 26.22, -58.36)
CIE-LCH	lch(31.74, 63.98, 294.19°)
OKLab	oklab(42.12% -0.0163 -0.1688)
OKLCH	oklch(42.12% 0.17 264.5)
XYZ	xyz(9.4925, 6.9693, 37.8831)
Luminance	0.0697 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C42A8 #A8821C

analogous

#1C88A8 #1C42A8 #3C1CA8

triadic

#1C42A8 #A81C42 #42A81C

tetradic

#1C42A8 #A81C88 #A8821C #1CA83C

square

#1C42A8 #A81C88 #A8821C #1CA83C

split-complementary

#1C42A8 #A83C1C #88A81C

monochromatic

#0B193F #132D74 #1C42A8 #2657DB #5B80E4

Accessibility & contrast

On white

8.77

#1C42A8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.39

#1C42A8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C42A8

8.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C42A8	#FFFFFF	#000000	##FFFFFF
##1C42A8	1.00	8.77	2.39	8.77
#FFFFFF	8.77	1.00	21.00	1.00
#000000	2.39	21.00	1.00	21.00
##FFFFFF	8.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051AB

Deuteranopia (green-blind)

#0044A6

Tritanopia (blue-blind)

#005C6E

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #1c42a8;
/* rgb */ color: rgb(28, 66, 168);
/* oklch */ color: oklch(42.1% 0.170 264.5);

Tailwind

colors: {
  custom: {
    50: '#7275c3',
    500: '#1c42a8',
    950: '#000000',
  },
}

SCSS

$custom: #1c42a8;
$custom-light: #7275c3;
$custom-dark: #000000;

JSON

{
  "hex": "#1c42a8",
  "rgb": {
    "r": 28,
    "g": 66,
    "b": 168
  },
  "hsl": {
    "h": 223.714,
    "s": 71.429,
    "l": 38.431
  },
  "oklch": {
    "l": 0.42123,
    "c": 0.16962,
    "h": 264.5
  },
  "luminance": 0.0697
}

Semantic roles & 50–950 ramp

primary

#1C42A8

secondary

#C7A958

accent

#BD3AEE

background

#F7F7FC

surface

#EEEDF8

border

#C9C8D1

text

#090813

muted

#7B7B82

Preview Lab

Preview with #1C42A8

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

Preview Lab → · Contrast checker → · Palette generator →