#123F8E#123F8E

#123F8E is a dark, vivid blue. Relative luminance 0.056; OKLCH L 38.9% C 0.140 H 260.9°. Best body text is #FFFFFF at 9.87:1 contrast (WCAG AA passes).

Color values

HEX	#123F8E
RGB	rgb(18, 63, 142)
HSL	hsl(218, 78%, 31%)
HSV	hsv(218, 87%, 56%)
CMYK	cmyk(87.3%, 55.6%, 0%, 44.3%)
CIE-LAB	lab(28.47, 16.96, -47.89)
CIE-LCH	lch(28.47, 50.81, 289.50°)
OKLab	oklab(38.92% -0.0222 -0.1383)
OKLCH	oklch(38.92% 0.14 260.9)
XYZ	xyz(6.9077, 5.6357, 26.3097)
Luminance	0.0564 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#123F8E #8E6112

analogous

#127D8E #123F8E #23128E

triadic

#123F8E #8E123F #3F8E12

tetradic

#123F8E #8E127D #8E6112 #128E23

square

#123F8E #8E127D #8E6112 #128E23

split-complementary

#123F8E #8E2312 #7D8E12

monochromatic

#040F21 #0B2758 #123F8E #1957C4 #3575E5

Accessibility & contrast

On white

9.87

#123F8E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.13

#123F8E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #123F8E

9.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##123F8E	#FFFFFF	#000000	##FFFFFF
##123F8E	1.00	9.87	2.13	9.87
#FFFFFF	9.87	1.00	21.00	1.00
#000000	2.13	21.00	1.00	21.00
##FFFFFF	9.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004991

Deuteranopia (green-blind)

#003E8C

Tritanopia (blue-blind)

#005360

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #123f8e;
/* rgb */ color: rgb(18, 63, 142);
/* oklch */ color: oklch(38.9% 0.140 260.9);

Tailwind

colors: {
  custom: {
    50: '#6973b0',
    500: '#123f8e',
    950: '#000000',
  },
}

SCSS

$custom: #123f8e;
$custom-light: #6973b0;
$custom-dark: #000000;

JSON

{
  "hex": "#123f8e",
  "rgb": {
    "r": 18,
    "g": 63,
    "b": 142
  },
  "hsl": {
    "h": 218.226,
    "s": 77.5,
    "l": 31.373
  },
  "oklch": {
    "l": 0.38917,
    "c": 0.14005,
    "h": 260.9
  },
  "luminance": 0.05637
}

Semantic roles & 50–950 ramp

primary

#123F8E

secondary

#C2913A

accent

#AE34F4

background

#F6F6FA

surface

#ECECF5

border

#C7C7CF

text

#070810

muted

#7A7B7F

Preview Lab

Preview with #123F8E

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

Preview Lab → · Contrast checker → · Palette generator →