#123D8A#123D8A

#123D8A is a dark, vivid blue. Relative luminance 0.053; OKLCH L 38.1% C 0.137 H 261.1°. Best body text is #FFFFFF at 10.19:1 contrast (WCAG AA passes).

Color values

HEX	#123D8A
RGB	rgb(18, 61, 138)
HSL	hsl(219, 77%, 31%)
HSV	hsv(219, 87%, 54%)
CMYK	cmyk(87%, 55.8%, 0%, 45.9%)
CIE-LAB	lab(27.57, 16.69, -46.88)
CIE-LCH	lch(27.57, 49.77, 289.60°)
OKLab	oklab(38.13% -0.0213 -0.1354)
OKLCH	oklch(38.13% 0.137 261.1)
XYZ	xyz(6.5040, 5.3002, 24.7201)
Luminance	0.0530 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#123D8A #8A5F12

analogous

#12798A #123D8A #23128A

triadic

#123D8A #8A123D #3D8A12

tetradic

#123D8A #8A1279 #8A5F12 #128A23

square

#123D8A #8A1279 #8A5F12 #128A23

split-complementary

#123D8A #8A2312 #798A12

monochromatic

#040D1E #0B2554 #123D8A #1955C0 #3272E4

Accessibility & contrast

On white

10.19

#123D8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.06

#123D8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #123D8A

10.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##123D8A	#FFFFFF	#000000	##FFFFFF
##123D8A	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)

#00478D

Deuteranopia (green-blind)

#003C89

Tritanopia (blue-blind)

#00505D

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #123d8a;
/* rgb */ color: rgb(18, 61, 138);
/* oklch */ color: oklch(38.1% 0.137 261.1);

Tailwind

colors: {
  custom: {
    50: '#6871ad',
    500: '#123d8a',
    950: '#000000',
  },
}

SCSS

$custom: #123d8a;
$custom-light: #6871ad;
$custom-dark: #000000;

JSON

{
  "hex": "#123d8a",
  "rgb": {
    "r": 18,
    "g": 61,
    "b": 138
  },
  "hsl": {
    "h": 218.5,
    "s": 76.923,
    "l": 30.588
  },
  "oklch": {
    "l": 0.38134,
    "c": 0.13703,
    "h": 261.1
  },
  "luminance": 0.05301
}

Semantic roles & 50–950 ramp

primary

#123D8A

secondary

#BF8F39

accent

#AF34F3

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #123D8A

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

Preview Lab → · Contrast checker → · Palette generator →