#123F8F#123F8F

#123F8F is a dark, vivid blue. Relative luminance 0.057; OKLCH L 39.0% C 0.141 H 261.0°. Best body text is #FFFFFF at 9.84:1 contrast (WCAG AA passes).

Color values

HEX	#123F8F
RGB	rgb(18, 63, 143)
HSL	hsl(218, 78%, 32%)
HSV	hsv(218, 87%, 56%)
CMYK	cmyk(87.4%, 55.9%, 0%, 43.9%)
CIE-LAB	lab(28.55, 17.37, -48.38)
CIE-LCH	lch(28.55, 51.40, 289.75°)
OKLab	oklab(39% -0.0221 -0.1397)
OKLCH	oklch(39% 0.141 261)
XYZ	xyz(6.9831, 5.6659, 26.7069)
Luminance	0.0567 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#123F8F #8F6212

analogous

#127E8F #123F8F #24128F

triadic

#123F8F #8F123F #3F8F12

tetradic

#123F8F #8F127E #8F6212 #128F24

square

#123F8F #8F127E #8F6212 #128F24

split-complementary

#123F8F #8F2412 #7E8F12

monochromatic

#040F22 #0B2759 #123F8F #1957C5 #3675E6

Accessibility & contrast

On white

9.84

#123F8F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.13

#123F8F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #123F8F

9.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##123F8F	#FFFFFF	#000000	##FFFFFF
##123F8F	1.00	9.84	2.13	9.84
#FFFFFF	9.84	1.00	21.00	1.00
#000000	2.13	21.00	1.00	21.00
##FFFFFF	9.84	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004992

Deuteranopia (green-blind)

#003E8D

Tritanopia (blue-blind)

#005360

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #123f8f;
/* rgb */ color: rgb(18, 63, 143);
/* oklch */ color: oklch(39.0% 0.141 261.0);

Tailwind

colors: {
  custom: {
    50: '#6973b0',
    500: '#123f8f',
    950: '#000000',
  },
}

SCSS

$custom: #123f8f;
$custom-light: #6973b0;
$custom-dark: #000000;

JSON

{
  "hex": "#123f8f",
  "rgb": {
    "r": 18,
    "g": 63,
    "b": 143
  },
  "hsl": {
    "h": 218.4,
    "s": 77.64,
    "l": 31.569
  },
  "oklch": {
    "l": 0.39002,
    "c": 0.14145,
    "h": 261
  },
  "luminance": 0.05667
}

Semantic roles & 50–950 ramp

primary

#123F8F

secondary

#C3923A

accent

#AF34F4

background

#F6F6FA

surface

#ECECF5

border

#C7C7CF

text

#080811

muted

#7A7B80

Preview Lab

Preview with #123F8F

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

Preview Lab → · Contrast checker → · Palette generator →