#1C128C#1C128C

#1C128C is a dark, vivid blue. Relative luminance 0.026; OKLCH L 31.5% C 0.184 H 272.0°. Best body text is #FFFFFF at 13.87:1 contrast (WCAG AA passes).

Color values

HEX	#1C128C
RGB	rgb(28, 18, 140)
HSL	hsl(245, 77%, 31%)
HSV	hsv(245, 87%, 55%)
CMYK	cmyk(80%, 87.1%, 0%, 45.1%)
CIE-LAB	lab(18.24, 44.94, -63.46)
CIE-LCH	lch(18.24, 77.76, 305.31°)
OKLab	oklab(31.53% 0.0064 -0.1835)
OKLCH	oklch(31.53% 0.184 272)
XYZ	xyz(5.4272, 2.5723, 25.0163)
Luminance	0.0257 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C128C #828C12

analogous

#12458C #1C128C #59128C

triadic

#1C128C #8C1C12 #128C1C

tetradic

#1C128C #8C1245 #828C12 #128C59

square

#1C128C #8C1245 #828C12 #128C59

split-complementary

#1C128C #8C5912 #458C12

monochromatic

#060420 #110B56 #1C128C #2719C2 #4234E5

Accessibility & contrast

On white

13.87

#1C128C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.51

#1C128C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C128C

13.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C128C	#FFFFFF	#000000	##FFFFFF
##1C128C	1.00	13.87	1.51	13.87
#FFFFFF	13.87	1.00	21.00	1.00
#000000	1.51	21.00	1.00	21.00
##FFFFFF	13.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00328F

Deuteranopia (green-blind)

#00268A

Tritanopia (blue-blind)

#003B52

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #1c128c;
/* rgb */ color: rgb(28, 18, 140);
/* oklch */ color: oklch(31.5% 0.184 272.0);

Tailwind

colors: {
  custom: {
    50: '#6f55af',
    500: '#1c128c',
    950: '#000000',
  },
}

SCSS

$custom: #1c128c;
$custom-light: #6f55af;
$custom-dark: #000000;

JSON

{
  "hex": "#1c128c",
  "rgb": {
    "r": 28,
    "g": 18,
    "b": 140
  },
  "hsl": {
    "h": 244.918,
    "s": 77.215,
    "l": 30.98
  },
  "oklch": {
    "l": 0.31525,
    "c": 0.18365,
    "h": 272
  },
  "luminance": 0.02573
}

Semantic roles & 50–950 ramp

primary

#1C128C

secondary

#B5C039

accent

#F434E4

background

#F7F5FA

surface

#EDE9F5

border

#C8C5CF

text

#090311

muted

#7B7880

Preview Lab

Preview with #1C128C

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

Preview Lab → · Contrast checker → · Palette generator →