#1C177B#1C177B

#1C177B is a dark, vivid blue. Relative luminance 0.023; OKLCH L 30.0% C 0.159 H 273.4°. Best body text is #FFFFFF at 14.40:1 contrast (WCAG AA passes).

Color values

HEX	#1C177B
RGB	rgb(28, 23, 123)
HSL	hsl(243, 68%, 29%)
HSV	hsv(243, 81%, 48%)
CMYK	cmyk(77.2%, 81.3%, 0%, 51.8%)
CIE-LAB	lab(16.94, 37.00, -54.87)
CIE-LCH	lch(16.94, 66.18, 303.99°)
OKLab	oklab(30.01% 0.0093 -0.1587)
OKLCH	oklch(30.01% 0.159 273.4)
XYZ	xyz(4.3592, 2.2893, 18.9472)
Luminance	0.0229 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C177B #767B17

analogous

#17447B #1C177B #4E177B

triadic

#1C177B #7B1C17 #177B1C

tetradic

#1C177B #7B1744 #767B17 #177B4E

square

#1C177B #7B1744 #767B17 #177B4E

split-complementary

#1C177B #7B4E17 #447B17

monochromatic

#06051A #100D47 #1C177B #2821AF #3C33D9

Accessibility & contrast

On white

14.40

#1C177B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.46

#1C177B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C177B

14.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C177B	#FFFFFF	#000000	##FFFFFF
##1C177B	1.00	14.40	1.46	14.40
#FFFFFF	14.40	1.00	21.00	1.00
#000000	1.46	21.00	1.00	21.00
##FFFFFF	14.40	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002E7E

Deuteranopia (green-blind)

#002579

Tritanopia (blue-blind)

#003649

Achromatopsia (no color)

#2A2A2A

Design tokens & code

CSS

--color: #1c177b;
/* rgb */ color: rgb(28, 23, 123);
/* oklch */ color: oklch(30.0% 0.159 273.4);

Tailwind

colors: {
  custom: {
    50: '#6a56a2',
    500: '#1c177b',
    950: '#000000',
  },
}

SCSS

$custom: #1c177b;
$custom-light: #6a56a2;
$custom-dark: #000000;

JSON

{
  "hex": "#1c177b",
  "rgb": {
    "r": 28,
    "g": 23,
    "b": 123
  },
  "hsl": {
    "h": 243,
    "s": 68.493,
    "l": 28.627
  },
  "oklch": {
    "l": 0.30006,
    "c": 0.15902,
    "h": 273.4
  },
  "luminance": 0.0229
}

Semantic roles & 50–950 ramp

primary

#1C177B

secondary

#AAB03E

accent

#EB3CE3

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#08030F

muted

#7A787F

Preview Lab

Preview with #1C177B

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

Preview Lab → · Contrast checker → · Palette generator →