#1C31A9#1C31A9

#1C31A9 is a dark, vivid blue. Relative luminance 0.053; OKLCH L 39.1% C 0.191 H 267.6°. Best body text is #FFFFFF at 10.19:1 contrast (WCAG AA passes).

Color values

HEX	#1C31A9
RGB	rgb(28, 49, 169)
HSL	hsl(231, 72%, 39%)
HSV	hsv(231, 83%, 66%)
CMYK	cmyk(83.4%, 71%, 0%, 33.7%)
CIE-LAB	lab(27.59, 37.75, -65.77)
CIE-LCH	lch(27.59, 75.83, 299.86°)
OKLab	oklab(39.11% -0.0081 -0.1906)
OKLCH	oklch(39.11% 0.191 267.6)
XYZ	xyz(8.7361, 5.3070, 38.0923)
Luminance	0.0531 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C31A9 #A9941C

analogous

#1C77A9 #1C31A9 #4D1CA9

triadic

#1C31A9 #A91C31 #31A91C

tetradic

#1C31A9 #A91C77 #A9941C #1CA94D

square

#1C31A9 #A91C77 #A9941C #1CA94D

split-complementary

#1C31A9 #A94D1C #77A91C

monochromatic

#0B1340 #132274 #1C31A9 #2742DB #5B70E4

Accessibility & contrast

On white

10.19

#1C31A9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.06

#1C31A9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C31A9

10.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C31A9	#FFFFFF	#000000	##FFFFFF
##1C31A9	1.00	10.19	2.06	10.19
#FFFFFF	10.19	1.00	21.00	1.00
#000000	2.06	21.00	1.00	21.00
##FFFFFF	10.19	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0048AD

Deuteranopia (green-blind)

#003AA7

Tritanopia (blue-blind)

#005369

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #1c31a9;
/* rgb */ color: rgb(28, 49, 169);
/* oklch */ color: oklch(39.1% 0.191 267.6);

Tailwind

colors: {
  custom: {
    50: '#7469c4',
    500: '#1c31a9',
    950: '#000000',
  },
}

SCSS

$custom: #1c31a9;
$custom-light: #7469c4;
$custom-dark: #000000;

JSON

{
  "hex": "#1c31a9",
  "rgb": {
    "r": 28,
    "g": 49,
    "b": 169
  },
  "hsl": {
    "h": 231.064,
    "s": 71.574,
    "l": 38.627
  },
  "oklch": {
    "l": 0.39105,
    "c": 0.19078,
    "h": 267.6
  },
  "luminance": 0.05308
}

Semantic roles & 50–950 ramp

primary

#1C31A9

secondary

#C8B759

accent

#D339EE

background

#F7F6FC

surface

#EEEBF8

border

#C9C6D1

text

#0A0613

muted

#7C7A82

Preview Lab

Preview with #1C31A9

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

Preview Lab → · Contrast checker → · Palette generator →