#1D177B#1D177B

#1D177B is a dark, vivid blue. Relative luminance 0.023; OKLCH L 30.1% C 0.159 H 273.8°. Best body text is #FFFFFF at 14.38:1 contrast (WCAG AA passes).

Color values

HEX	#1D177B
RGB	rgb(29, 23, 123)
HSL	hsl(244, 68%, 29%)
HSV	hsv(244, 81%, 48%)
CMYK	cmyk(76.4%, 81.3%, 0%, 51.8%)
CIE-LAB	lab(17.01, 37.09, -54.75)
CIE-LCH	lch(17.01, 66.13, 304.11°)
OKLab	oklab(30.07% 0.0107 -0.1584)
OKLCH	oklch(30.07% 0.159 273.8)
XYZ	xyz(4.3871, 2.3036, 18.9485)
Luminance	0.0230 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D177B #757B17

analogous

#17437B #1D177B #4F177B

triadic

#1D177B #7B1D17 #177B1D

tetradic

#1D177B #7B1743 #757B17 #177B4F

square

#1D177B #7B1743 #757B17 #177B4F

split-complementary

#1D177B #7B4F17 #437B17

monochromatic

#06051A #110D47 #1D177B #2921AF #3D33D9

Accessibility & contrast

On white

14.38

#1D177B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.46

#1D177B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D177B

14.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D177B	#FFFFFF	#000000	##FFFFFF
##1D177B	1.00	14.38	1.46	14.38
#FFFFFF	14.38	1.00	21.00	1.00
#000000	1.46	21.00	1.00	21.00
##FFFFFF	14.38	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: #1d177b;
/* rgb */ color: rgb(29, 23, 123);
/* oklch */ color: oklch(30.1% 0.159 273.8);

Tailwind

colors: {
  custom: {
    50: '#6a56a2',
    500: '#1d177b',
    950: '#000000',
  },
}

SCSS

$custom: #1d177b;
$custom-light: #6a56a2;
$custom-dark: #000000;

JSON

{
  "hex": "#1d177b",
  "rgb": {
    "r": 29,
    "g": 23,
    "b": 123
  },
  "hsl": {
    "h": 243.6,
    "s": 68.493,
    "l": 28.627
  },
  "oklch": {
    "l": 0.30072,
    "c": 0.15875,
    "h": 273.8
  },
  "luminance": 0.02304
}

Semantic roles & 50–950 ramp

primary

#1D177B

secondary

#A9B03E

accent

#EB3CE1

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#08030F

muted

#7A787F

Preview Lab

Preview with #1D177B

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

Preview Lab → · Contrast checker → · Palette generator →