#123E8F#123E8F

#123E8F is a dark, vivid blue. Relative luminance 0.056; OKLCH L 38.8% C 0.143 H 261.3°. Best body text is #FFFFFF at 9.95:1 contrast (WCAG AA passes).

Color values

HEX	#123E8F
RGB	rgb(18, 62, 143)
HSL	hsl(219, 78%, 32%)
HSV	hsv(219, 87%, 56%)
CMYK	cmyk(87.4%, 56.6%, 0%, 43.9%)
CIE-LAB	lab(28.26, 18.07, -48.85)
CIE-LCH	lch(28.26, 52.08, 290.30°)
OKLab	oklab(38.78% -0.0215 -0.1411)
OKLCH	oklch(38.78% 0.143 261.3)
XYZ	xyz(6.9282, 5.5561, 26.6886)
Luminance	0.0556 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#123E8F #8F6312

analogous

#127D8F #123E8F #25128F

triadic

#123E8F #8F123E #3E8F12

tetradic

#123E8F #8F127D #8F6312 #128F25

square

#123E8F #8F127D #8F6312 #128F25

split-complementary

#123E8F #8F2512 #7D8F12

monochromatic

#040F22 #0B2659 #123E8F #1956C5 #3674E6

Accessibility & contrast

On white

9.95

#123E8F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.11

#123E8F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #123E8F

9.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##123E8F	#FFFFFF	#000000	##FFFFFF
##123E8F	1.00	9.95	2.11	9.95
#FFFFFF	9.95	1.00	21.00	1.00
#000000	2.11	21.00	1.00	21.00
##FFFFFF	9.95	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004992

Deuteranopia (green-blind)

#003D8D

Tritanopia (blue-blind)

#005260

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #123e8f;
/* rgb */ color: rgb(18, 62, 143);
/* oklch */ color: oklch(38.8% 0.143 261.3);

Tailwind

colors: {
  custom: {
    50: '#6972b0',
    500: '#123e8f',
    950: '#000000',
  },
}

SCSS

$custom: #123e8f;
$custom-light: #6972b0;
$custom-dark: #000000;

JSON

{
  "hex": "#123e8f",
  "rgb": {
    "r": 18,
    "g": 62,
    "b": 143
  },
  "hsl": {
    "h": 218.88,
    "s": 77.64,
    "l": 31.569
  },
  "oklch": {
    "l": 0.38783,
    "c": 0.14273,
    "h": 261.3
  },
  "luminance": 0.05557
}

Semantic roles & 50–950 ramp

primary

#123E8F

secondary

#C3933A

accent

#B034F4

background

#F6F6FA

surface

#ECECF5

border

#C7C7CF

text

#080711

muted

#7A7A80

Preview Lab

Preview with #123E8F

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

Preview Lab → · Contrast checker → · Palette generator →