#1C3871#1C3871

#1C3871 is a dark, moderate blue. Relative luminance 0.043; OKLCH L 35.3% C 0.104 H 262.6°. Best body text is #FFFFFF at 11.33:1 contrast (WCAG AA passes).

Color values

HEX	#1C3871
RGB	rgb(28, 56, 113)
HSL	hsl(220, 60%, 28%)
HSV	hsv(220, 75%, 44%)
CMYK	cmyk(75.2%, 50.4%, 0%, 55.7%)
CIE-LAB	lab(24.54, 11.02, -36.06)
CIE-LCH	lch(24.54, 37.71, 287.00°)
OKLab	oklab(35.32% -0.0134 -0.1035)
OKLCH	oklch(35.32% 0.104 262.6)
XYZ	xyz(4.8726, 4.2670, 16.1864)
Luminance	0.0427 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C3871 #71551C

analogous

#1C6371 #1C3871 #2A1C71

triadic

#1C3871 #711C38 #38711C

tetradic

#1C3871 #711C63 #71551C #1C712A

square

#1C3871 #711C63 #71551C #1C712A

split-complementary

#1C3871 #712A1C #63711C

monochromatic

#060C19 #102040 #1C3871 #2850A2 #396ACE

Accessibility & contrast

On white

11.33

#1C3871 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.85

#1C3871 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C3871

11.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C3871	#FFFFFF	#000000	##FFFFFF
##1C3871	1.00	11.33	1.85	11.33
#FFFFFF	11.33	1.00	21.00	1.00
#000000	1.85	21.00	1.00	21.00
##FFFFFF	11.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#193E73

Deuteranopia (green-blind)

#023770

Tritanopia (blue-blind)

#00454F

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #1c3871;
/* rgb */ color: rgb(28, 56, 113);
/* oklch */ color: oklch(35.3% 0.104 262.6);

Tailwind

colors: {
  custom: {
    50: '#656e9a',
    500: '#1c3871',
    950: '#000000',
  },
}

SCSS

$custom: #1c3871;
$custom-light: #656e9a;
$custom-dark: #000000;

JSON

{
  "hex": "#1c3871",
  "rgb": {
    "r": 28,
    "g": 56,
    "b": 113
  },
  "hsl": {
    "h": 220.235,
    "s": 60.284,
    "l": 27.647
  },
  "oklch": {
    "l": 0.35315,
    "c": 0.10432,
    "h": 262.6
  },
  "luminance": 0.04267
}

Semantic roles & 50–950 ramp

primary

#1C3871

secondary

#A68543

accent

#AF44E3

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06070E

muted

#7A7A7E

Preview Lab

Preview with #1C3871

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

Preview Lab → · Contrast checker → · Palette generator →