#1731A0#1731A0

#1731A0 is a dark, vivid blue. Relative luminance 0.049; OKLCH L 38.0% C 0.180 H 266.4°. Best body text is #FFFFFF at 10.59:1 contrast (WCAG AA passes).

Color values

HEX	#1731A0
RGB	rgb(23, 49, 160)
HSL	hsl(229, 75%, 36%)
HSV	hsv(229, 86%, 63%)
CMYK	cmyk(85.6%, 69.4%, 0%, 37.3%)
CIE-LAB	lab(26.49, 34.07, -62.14)
CIE-LCH	lch(26.49, 70.87, 298.73°)
OKLab	oklab(37.98% -0.0113 -0.1801)
OKLCH	oklch(37.98% 0.18 266.4)
XYZ	xyz(7.7946, 4.9159, 33.7889)
Luminance	0.0492 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1731A0 #A08617

analogous

#1775A0 #1731A0 #4117A0

triadic

#1731A0 #A01731 #31A017

tetradic

#1731A0 #A01775 #A08617 #17A041

square

#1731A0 #A01775 #A08617 #17A041

split-complementary

#1731A0 #A04117 #75A017

monochromatic

#081035 #0F216A #1731A0 #1F41D6 #4C69E5

Accessibility & contrast

On white

10.59

#1731A0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.98

#1731A0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1731A0

10.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1731A0	#FFFFFF	#000000	##FFFFFF
##1731A0	1.00	10.59	1.98	10.59
#FFFFFF	10.59	1.00	21.00	1.00
#000000	1.98	21.00	1.00	21.00
##FFFFFF	10.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0045A3

Deuteranopia (green-blind)

#00389E

Tritanopia (blue-blind)

#005064

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #1731a0;
/* rgb */ color: rgb(23, 49, 160);
/* oklch */ color: oklch(38.0% 0.180 266.4);

Tailwind

colors: {
  custom: {
    50: '#7069bd',
    500: '#1731a0',
    950: '#000000',
  },
}

SCSS

$custom: #1731a0;
$custom-light: #7069bd;
$custom-dark: #000000;

JSON

{
  "hex": "#1731a0",
  "rgb": {
    "r": 23,
    "g": 49,
    "b": 160
  },
  "hsl": {
    "h": 228.613,
    "s": 74.863,
    "l": 35.882
  },
  "oklch": {
    "l": 0.37982,
    "c": 0.18048,
    "h": 266.4
  },
  "luminance": 0.04917
}

Semantic roles & 50–950 ramp

primary

#1731A0

secondary

#C7B04C

accent

#CE36F1

background

#F7F6FB

surface

#EDEBF7

border

#C8C6D0

text

#090612

muted

#7B7A81

Preview Lab

Preview with #1731A0

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

Preview Lab → · Contrast checker → · Palette generator →