#1C178F#1C178F

#1C178F is a dark, vivid blue. Relative luminance 0.028; OKLCH L 32.4% C 0.184 H 271.4°. Best body text is #FFFFFF at 13.39:1 contrast (WCAG AA passes).

Color values

HEX	#1C178F
RGB	rgb(28, 23, 143)
HSL	hsl(243, 72%, 33%)
HSV	hsv(243, 84%, 56%)
CMYK	cmyk(80.4%, 83.9%, 0%, 43.9%)
CIE-LAB	lab(19.40, 43.60, -63.41)
CIE-LCH	lch(19.40, 76.95, 304.51°)
OKLab	oklab(32.43% 0.0044 -0.1835)
OKLCH	oklch(32.43% 0.184 271.4)
XYZ	xyz(5.7415, 2.8422, 26.2273)
Luminance	0.0284 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C178F #8A8F17

analogous

#174E8F #1C178F #58178F

triadic

#1C178F #8F1C17 #178F1C

tetradic

#1C178F #8F174E #8A8F17 #178F58

square

#1C178F #8F174E #8A8F17 #178F58

split-complementary

#1C178F #8F5817 #4E8F17

monochromatic

#070626 #120F5A #1C178F #261FC4 #4740E0

Accessibility & contrast

On white

13.39

#1C178F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.57

#1C178F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C178F

13.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C178F	#FFFFFF	#000000	##FFFFFF
##1C178F	1.00	13.39	1.57	13.39
#FFFFFF	13.39	1.00	21.00	1.00
#000000	1.57	21.00	1.00	21.00
##FFFFFF	13.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003592

Deuteranopia (green-blind)

#00298D

Tritanopia (blue-blind)

#003E54

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #1c178f;
/* rgb */ color: rgb(28, 23, 143);
/* oklch */ color: oklch(32.4% 0.184 271.4);

Tailwind

colors: {
  custom: {
    50: '#6f58b1',
    500: '#1c178f',
    950: '#000000',
  },
}

SCSS

$custom: #1c178f;
$custom-light: #6f58b1;
$custom-dark: #000000;

JSON

{
  "hex": "#1c178f",
  "rgb": {
    "r": 28,
    "g": 23,
    "b": 143
  },
  "hsl": {
    "h": 242.5,
    "s": 72.289,
    "l": 32.549
  },
  "oklch": {
    "l": 0.32433,
    "c": 0.18354,
    "h": 271.4
  },
  "luminance": 0.02843
}

Semantic roles & 50–950 ramp

primary

#1C178F

secondary

#BBC141

accent

#EF39E7

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#090311

muted

#7B7880

Preview Lab

Preview with #1C178F

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

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