#123583#123583

#123583 is a dark, vivid blue. Relative luminance 0.043; OKLCH L 35.8% C 0.138 H 263.1°. Best body text is #FFFFFF at 11.27:1 contrast (WCAG AA passes).

Color values

HEX	#123583
RGB	rgb(18, 53, 131)
HSL	hsl(221, 76%, 29%)
HSV	hsv(221, 86%, 51%)
CMYK	cmyk(86.3%, 59.5%, 0%, 48.6%)
CIE-LAB	lab(24.68, 19.42, -47.23)
CIE-LCH	lch(24.68, 51.07, 292.35°)
OKLab	oklab(35.77% -0.0166 -0.1365)
OKLCH	oklch(35.77% 0.138 263.1)
XYZ	xyz(5.6178, 4.3128, 22.0047)
Luminance	0.0431 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#123583 #836012

analogous

#126E83 #123583 #281283

triadic

#123583 #831235 #358312

tetradic

#123583 #83126E #836012 #128328

square

#123583 #83126E #836012 #128328

split-complementary

#123583 #832812 #6E8312

monochromatic

#040B1B #0B1F4D #123583 #194BB9 #2D65E2

Accessibility & contrast

On white

11.27

#123583 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.86

#123583 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #123583

11.27:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##123583	#FFFFFF	#000000	##FFFFFF
##123583	1.00	11.27	1.86	11.27
#FFFFFF	11.27	1.00	21.00	1.00
#000000	1.86	21.00	1.00	21.00
##FFFFFF	11.27	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004086

Deuteranopia (green-blind)

#003681

Tritanopia (blue-blind)

#004956

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #123583;
/* rgb */ color: rgb(18, 53, 131);
/* oklch */ color: oklch(35.8% 0.138 263.1);

Tailwind

colors: {
  custom: {
    50: '#666ba8',
    500: '#123583',
    950: '#000000',
  },
}

SCSS

$custom: #123583;
$custom-light: #666ba8;
$custom-dark: #000000;

JSON

{
  "hex": "#123583",
  "rgb": {
    "r": 18,
    "g": 53,
    "b": 131
  },
  "hsl": {
    "h": 221.416,
    "s": 75.839,
    "l": 29.216
  },
  "oklch": {
    "l": 0.35766,
    "c": 0.13755,
    "h": 263.1
  },
  "luminance": 0.04313
}

Semantic roles & 50–950 ramp

primary

#123583

secondary

#B89138

accent

#B835F2

background

#F6F6FA

surface

#EBEBF4

border

#C6C6CE

text

#070610

muted

#7A7A7F

Preview Lab

Preview with #123583

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

Preview Lab → · Contrast checker → · Palette generator →