#1C1571#1C1571

#1C1571 is a dark, vivid blue. Relative luminance 0.020; OKLCH L 28.5% C 0.148 H 274.9°. Best body text is #FFFFFF at 15.05:1 contrast (WCAG AA passes).

Color values

HEX	#1C1571
RGB	rgb(28, 21, 113)
HSL	hsl(245, 69%, 26%)
HSV	hsv(245, 81%, 44%)
CMYK	cmyk(75.2%, 81.4%, 0%, 55.7%)
CIE-LAB	lab(15.36, 34.71, -51.05)
CIE-LCH	lch(15.36, 61.73, 304.21°)
OKLab	oklab(28.55% 0.0127 -0.1476)
OKLCH	oklch(28.55% 0.148 274.9)
XYZ	xyz(3.7267, 1.9751, 15.8044)
Luminance	0.0198 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C1571 #6A7115

analogous

#153C71 #1C1571 #4A1571

triadic

#1C1571 #711C15 #15711C

tetradic

#1C1571 #71153C #6A7115 #15714A

square

#1C1571 #71153C #6A7115 #15714A

split-complementary

#1C1571 #714A15 #3C7115

monochromatic

#06051A #0F0B3D #1C1571 #291FA5 #3629D7

Accessibility & contrast

On white

15.05

#1C1571 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.40

#1C1571 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C1571

15.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C1571	#FFFFFF	#000000	##FFFFFF
##1C1571	1.00	15.05	1.40	15.05
#FFFFFF	15.05	1.00	21.00	1.00
#000000	1.40	21.00	1.00	21.00
##FFFFFF	15.05	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002A74

Deuteranopia (green-blind)

#00226F

Tritanopia (blue-blind)

#003143

Achromatopsia (no color)

#262626

Design tokens & code

CSS

--color: #1c1571;
/* rgb */ color: rgb(28, 21, 113);
/* oklch */ color: oklch(28.5% 0.148 274.9);

Tailwind

colors: {
  custom: {
    50: '#68559b',
    500: '#1c1571',
    950: '#000000',
  },
}

SCSS

$custom: #1c1571;
$custom-light: #68559b;
$custom-dark: #000000;

JSON

{
  "hex": "#1c1571",
  "rgb": {
    "r": 28,
    "g": 21,
    "b": 113
  },
  "hsl": {
    "h": 244.565,
    "s": 68.657,
    "l": 26.275
  },
  "oklch": {
    "l": 0.28548,
    "c": 0.14816,
    "h": 274.9
  },
  "luminance": 0.01975
}

Semantic roles & 50–950 ramp

primary

#1C1571

secondary

#9FA73B

accent

#EB3CDE

background

#F6F5F9

surface

#ECE9F2

border

#C7C5CC

text

#07030E

muted

#7A787E

Preview Lab

Preview with #1C1571

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

Preview Lab → · Contrast checker → · Palette generator →