#1C1771#1C1771

#1C1771 is a dark, vivid blue. Relative luminance 0.021; OKLCH L 28.8% C 0.146 H 274.6°. Best body text is #FFFFFF at 14.89:1 contrast (WCAG AA passes).

Color values

HEX	#1C1771
RGB	rgb(28, 23, 113)
HSL	hsl(243, 66%, 27%)
HSV	hsv(243, 80%, 44%)
CMYK	cmyk(75.2%, 79.6%, 0%, 55.7%)
CIE-LAB	lab(15.76, 33.56, -50.39)
CIE-LCH	lch(15.76, 60.54, 303.67°)
OKLab	oklab(28.83% 0.0117 -0.1457)
OKLCH	oklch(28.83% 0.146 274.6)
XYZ	xyz(3.7649, 2.0516, 15.8172)
Luminance	0.0205 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C1771 #6C7117

analogous

#173F71 #1C1771 #491771

triadic

#1C1771 #711C17 #17711C

tetradic

#1C1771 #71173F #6C7117 #177149

square

#1C1771 #71173F #6C7117 #177149

split-complementary

#1C1771 #714917 #3F7117

monochromatic

#060519 #0F0D3E #1C1771 #2921A4 #372ED4

Accessibility & contrast

On white

14.89

#1C1771 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.41

#1C1771 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C1771

14.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C1771	#FFFFFF	#000000	##FFFFFF
##1C1771	1.00	14.89	1.41	14.89
#FFFFFF	14.89	1.00	21.00	1.00
#000000	1.41	21.00	1.00	21.00
##FFFFFF	14.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002B74

Deuteranopia (green-blind)

#00236F

Tritanopia (blue-blind)

#003243

Achromatopsia (no color)

#272727

Design tokens & code

CSS

--color: #1c1771;
/* rgb */ color: rgb(28, 23, 113);
/* oklch */ color: oklch(28.8% 0.146 274.6);

Tailwind

colors: {
  custom: {
    50: '#67569b',
    500: '#1c1771',
    950: '#000000',
  },
}

SCSS

$custom: #1c1771;
$custom-light: #67569b;
$custom-dark: #000000;

JSON

{
  "hex": "#1c1771",
  "rgb": {
    "r": 28,
    "g": 23,
    "b": 113
  },
  "hsl": {
    "h": 243.333,
    "s": 66.176,
    "l": 26.667
  },
  "oklch": {
    "l": 0.28829,
    "c": 0.14619,
    "h": 274.6
  },
  "luminance": 0.02052
}

Semantic roles & 50–950 ramp

primary

#1C1771

secondary

#A1A73D

accent

#E93FE0

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#07030E

muted

#7A787E

Preview Lab

Preview with #1C1771

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

Preview Lab → · Contrast checker → · Palette generator →