#1C2571#1C2571

#1C2571 is a dark, vivid blue. Relative luminance 0.028; OKLCH L 31.2% C 0.130 H 271.3°. Best body text is #FFFFFF at 13.53:1 contrast (WCAG AA passes).

Color values

HEX	#1C2571
RGB	rgb(28, 37, 113)
HSL	hsl(234, 60%, 28%)
HSV	hsv(234, 75%, 44%)
CMYK	cmyk(75.2%, 67.3%, 0%, 55.7%)
CIE-LAB	lab(19.06, 24.51, -44.94)
CIE-LCH	lch(19.06, 51.19, 298.60°)
OKLab	oklab(31.21% 0.0029 -0.1299)
OKLCH	oklch(31.21% 0.13 271.3)
XYZ	xyz(4.1201, 2.7618, 15.9355)
Luminance	0.0276 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C2571 #71681C

analogous

#1C4F71 #1C2571 #3D1C71

triadic

#1C2571 #711C25 #25711C

tetradic

#1C2571 #711C4F #71681C #1C713D

square

#1C2571 #711C4F #71681C #1C713D

split-complementary

#1C2571 #713D1C #4F711C

monochromatic

#060819 #101540 #1C2571 #2835A2 #3949CE

Accessibility & contrast

On white

13.53

#1C2571 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.55

#1C2571 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C2571

13.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C2571	#FFFFFF	#000000	##FFFFFF
##1C2571	1.00	13.53	1.55	13.53
#FFFFFF	13.53	1.00	21.00	1.00
#000000	1.55	21.00	1.00	21.00
##FFFFFF	13.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003273

Deuteranopia (green-blind)

#002A70

Tritanopia (blue-blind)

#003947

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #1c2571;
/* rgb */ color: rgb(28, 37, 113);
/* oklch */ color: oklch(31.2% 0.130 271.3);

Tailwind

colors: {
  custom: {
    50: '#665f9b',
    500: '#1c2571',
    950: '#000000',
  },
}

SCSS

$custom: #1c2571;
$custom-light: #665f9b;
$custom-dark: #000000;

JSON

{
  "hex": "#1c2571",
  "rgb": {
    "r": 28,
    "g": 37,
    "b": 113
  },
  "hsl": {
    "h": 233.647,
    "s": 60.284,
    "l": 27.647
  },
  "oklch": {
    "l": 0.31209,
    "c": 0.12989,
    "h": 271.3
  },
  "luminance": 0.02762
}

Semantic roles & 50–950 ramp

primary

#1C2571

secondary

#A69B43

accent

#D344E3

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#07040E

muted

#7A797E

Preview Lab

Preview with #1C2571

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

Preview Lab → · Contrast checker → · Palette generator →