#123D8F#123D8F

#123D8F is a dark, vivid blue. Relative luminance 0.054; OKLCH L 38.6% C 0.144 H 261.7°. Best body text is #FFFFFF at 10.05:1 contrast (WCAG AA passes).

Color values

HEX	#123D8F
RGB	rgb(18, 61, 143)
HSL	hsl(219, 78%, 32%)
HSV	hsv(219, 87%, 56%)
CMYK	cmyk(87.4%, 57.3%, 0%, 43.9%)
CIE-LAB	lab(27.98, 18.77, -49.32)
CIE-LCH	lch(27.98, 52.77, 290.84°)
OKLab	oklab(38.57% -0.0208 -0.1425)
OKLCH	oklch(38.57% 0.144 261.7)
XYZ	xyz(6.8743, 5.4484, 26.6706)
Luminance	0.0545 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#123D8F #8F6412

analogous

#127C8F #123D8F #26128F

triadic

#123D8F #8F123D #3D8F12

tetradic

#123D8F #8F127C #8F6412 #128F26

square

#123D8F #8F127C #8F6412 #128F26

split-complementary

#123D8F #8F2612 #7C8F12

monochromatic

#040F22 #0B2659 #123D8F #1954C5 #3672E6

Accessibility & contrast

On white

10.05

#123D8F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.09

#123D8F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #123D8F

10.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##123D8F	#FFFFFF	#000000	##FFFFFF
##123D8F	1.00	10.05	2.09	10.05
#FFFFFF	10.05	1.00	21.00	1.00
#000000	2.09	21.00	1.00	21.00
##FFFFFF	10.05	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004892

Deuteranopia (green-blind)

#003D8D

Tritanopia (blue-blind)

#005260

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #123d8f;
/* rgb */ color: rgb(18, 61, 143);
/* oklch */ color: oklch(38.6% 0.144 261.7);

Tailwind

colors: {
  custom: {
    50: '#6971b0',
    500: '#123d8f',
    950: '#000000',
  },
}

SCSS

$custom: #123d8f;
$custom-light: #6971b0;
$custom-dark: #000000;

JSON

{
  "hex": "#123d8f",
  "rgb": {
    "r": 18,
    "g": 61,
    "b": 143
  },
  "hsl": {
    "h": 219.36,
    "s": 77.64,
    "l": 31.569
  },
  "oklch": {
    "l": 0.38565,
    "c": 0.14402,
    "h": 261.7
  },
  "luminance": 0.05449
}

Semantic roles & 50–950 ramp

primary

#123D8F

secondary

#C3943A

accent

#B234F4

background

#F6F6FA

surface

#ECECF5

border

#C7C7CF

text

#080711

muted

#7A7A80

Preview Lab

Preview with #123D8F

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

Preview Lab → · Contrast checker → · Palette generator →