#1C3C81#1C3C81

#1C3C81 is a dark, vivid blue. Relative luminance 0.051; OKLCH L 37.5% C 0.123 H 263.1°. Best body text is #FFFFFF at 10.43:1 contrast (WCAG AA passes).

Color values

HEX	#1C3C81
RGB	rgb(28, 60, 129)
HSL	hsl(221, 64%, 31%)
HSV	hsv(221, 78%, 51%)
CMYK	cmyk(78.3%, 53.5%, 0%, 49.4%)
CIE-LAB	lab(26.91, 14.73, -42.34)
CIE-LCH	lch(26.91, 44.82, 289.19°)
OKLab	oklab(37.51% -0.0148 -0.1218)
OKLCH	oklch(37.51% 0.123 263.1)
XYZ	xyz(6.0558, 5.0629, 21.4227)
Luminance	0.0506 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C3C81 #81611C

analogous

#1C6E81 #1C3C81 #2E1C81

triadic

#1C3C81 #811C3C #3C811C

tetradic

#1C3C81 #811C6E #81611C #1C812E

square

#1C3C81 #811C6E #81611C #1C812E

split-complementary

#1C3C81 #812E1C #6E811C

monochromatic

#060D1C #11254F #1C3C81 #2753B3 #4271D6

Accessibility & contrast

On white

10.43

#1C3C81 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.01

#1C3C81 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C3C81

10.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C3C81	#FFFFFF	#000000	##FFFFFF
##1C3C81	1.00	10.43	2.01	10.43
#FFFFFF	10.43	1.00	21.00	1.00
#000000	2.01	21.00	1.00	21.00
##FFFFFF	10.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0E4483

Deuteranopia (green-blind)

#003B80

Tritanopia (blue-blind)

#004D58

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #1c3c81;
/* rgb */ color: rgb(28, 60, 129);
/* oklch */ color: oklch(37.5% 0.123 263.1);

Tailwind

colors: {
  custom: {
    50: '#6871a6',
    500: '#1c3c81',
    950: '#000000',
  },
}

SCSS

$custom: #1c3c81;
$custom-light: #6871a6;
$custom-dark: #000000;

JSON

{
  "hex": "#1c3c81",
  "rgb": {
    "r": 28,
    "g": 60,
    "b": 129
  },
  "hsl": {
    "h": 220.99,
    "s": 64.331,
    "l": 30.784
  },
  "oklch": {
    "l": 0.37505,
    "c": 0.12274,
    "h": 263.1
  },
  "luminance": 0.05064
}

Semantic roles & 50–950 ramp

primary

#1C3C81

secondary

#B49144

accent

#B240E7

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #1C3C81

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

Preview Lab → · Contrast checker → · Palette generator →