#1C188F#1C188F

#1C188F is a dark, vivid blue. Relative luminance 0.029; OKLCH L 32.5% C 0.183 H 271.3°. Best body text is #FFFFFF at 13.32:1 contrast (WCAG AA passes).

Color values

HEX	#1C188F
RGB	rgb(28, 24, 143)
HSL	hsl(242, 71%, 33%)
HSV	hsv(242, 83%, 56%)
CMYK	cmyk(80.4%, 83.2%, 0%, 43.9%)
CIE-LAB	lab(19.57, 43.11, -63.13)
CIE-LCH	lch(19.57, 76.44, 304.33°)
OKLab	oklab(32.55% 0.0042 -0.1827)
OKLCH	oklch(32.55% 0.183 271.3)
XYZ	xyz(5.7618, 2.8827, 26.2340)
Luminance	0.0288 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C188F #8B8F18

analogous

#184F8F #1C188F #58188F

triadic

#1C188F #8F1C18 #188F1C

tetradic

#1C188F #8F184F #8B8F18 #188F58

square

#1C188F #8F184F #8B8F18 #188F58

split-complementary

#1C188F #8F5818 #4F8F18

monochromatic

#070626 #120F5B #1C188F #2621C3 #4742DF

Accessibility & contrast

On white

13.32

#1C188F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.58

#1C188F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C188F

13.32:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C188F	#FFFFFF	#000000	##FFFFFF
##1C188F	1.00	13.32	1.58	13.32
#FFFFFF	13.32	1.00	21.00	1.00
#000000	1.58	21.00	1.00	21.00
##FFFFFF	13.32	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003592

Deuteranopia (green-blind)

#00298D

Tritanopia (blue-blind)

#003E55

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #1c188f;
/* rgb */ color: rgb(28, 24, 143);
/* oklch */ color: oklch(32.5% 0.183 271.3);

Tailwind

colors: {
  custom: {
    50: '#6f58b1',
    500: '#1c188f',
    950: '#000000',
  },
}

SCSS

$custom: #1c188f;
$custom-light: #6f58b1;
$custom-dark: #000000;

JSON

{
  "hex": "#1c188f",
  "rgb": {
    "r": 28,
    "g": 24,
    "b": 143
  },
  "hsl": {
    "h": 242.017,
    "s": 71.257,
    "l": 32.745
  },
  "oklch": {
    "l": 0.32549,
    "c": 0.18276,
    "h": 271.3
  },
  "luminance": 0.02883
}

Semantic roles & 50–950 ramp

primary

#1C188F

secondary

#BCC043

accent

#EE3AE8

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#090411

muted

#7B7980

Preview Lab

Preview with #1C188F

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

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