#1C187B#1C187B

#1C187B is a dark, vivid blue. Relative luminance 0.023; OKLCH L 30.1% C 0.158 H 273.2°. Best body text is #FFFFFF at 14.32:1 contrast (WCAG AA passes).

Color values

HEX	#1C187B
RGB	rgb(28, 24, 123)
HSL	hsl(242, 67%, 29%)
HSV	hsv(242, 80%, 48%)
CMYK	cmyk(77.2%, 80.5%, 0%, 51.8%)
CIE-LAB	lab(17.13, 36.45, -54.55)
CIE-LCH	lch(17.13, 65.61, 303.75°)
OKLab	oklab(30.14% 0.0089 -0.1578)
OKLCH	oklch(30.14% 0.158 273.2)
XYZ	xyz(4.3795, 2.3298, 18.9539)
Luminance	0.0233 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C187B #777B18

analogous

#18467B #1C187B #4E187B

triadic

#1C187B #7B1C18 #187B1C

tetradic

#1C187B #7B1846 #777B18 #187B4E

square

#1C187B #7B1846 #777B18 #187B4E

split-complementary

#1C187B #7B4E18 #467B18

monochromatic

#06051A #100E48 #1C187B #2822AE #3C36D8

Accessibility & contrast

On white

14.32

#1C187B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.47

#1C187B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C187B

14.32:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C187B	#FFFFFF	#000000	##FFFFFF
##1C187B	1.00	14.32	1.47	14.32
#FFFFFF	14.32	1.00	21.00	1.00
#000000	1.47	21.00	1.00	21.00
##FFFFFF	14.32	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002F7E

Deuteranopia (green-blind)

#002579

Tritanopia (blue-blind)

#003649

Achromatopsia (no color)

#2A2A2A

Design tokens & code

CSS

--color: #1c187b;
/* rgb */ color: rgb(28, 24, 123);
/* oklch */ color: oklch(30.1% 0.158 273.2);

Tailwind

colors: {
  custom: {
    50: '#6a57a2',
    500: '#1c187b',
    950: '#000000',
  },
}

SCSS

$custom: #1c187b;
$custom-light: #6a57a2;
$custom-dark: #000000;

JSON

{
  "hex": "#1c187b",
  "rgb": {
    "r": 28,
    "g": 24,
    "b": 123
  },
  "hsl": {
    "h": 242.424,
    "s": 67.347,
    "l": 28.824
  },
  "oklch": {
    "l": 0.30141,
    "c": 0.15809,
    "h": 273.2
  },
  "luminance": 0.0233
}

Semantic roles & 50–950 ramp

primary

#1C187B

secondary

#ABB03F

accent

#EA3EE3

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#08030F

muted

#7A787F

Preview Lab

Preview with #1C187B

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

Preview Lab → · Contrast checker → · Palette generator →