#123F8A#123F8A

#123F8A is a dark, vivid blue. Relative luminance 0.055; OKLCH L 38.6% C 0.134 H 260.3°. Best body text is #FFFFFF at 9.98:1 contrast (WCAG AA passes).

Color values

HEX	#123F8A
RGB	rgb(18, 63, 138)
HSL	hsl(218, 77%, 31%)
HSV	hsv(218, 87%, 54%)
CMYK	cmyk(87%, 54.3%, 0%, 45.9%)
CIE-LAB	lab(28.16, 15.29, -45.93)
CIE-LCH	lch(28.16, 48.41, 288.42°)
OKLab	oklab(38.58% -0.0227 -0.1325)
OKLCH	oklch(38.58% 0.134 260.3)
XYZ	xyz(6.6127, 5.5178, 24.7563)
Luminance	0.0552 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#123F8A #8A5D12

analogous

#127B8A #123F8A #21128A

triadic

#123F8A #8A123F #3F8A12

tetradic

#123F8A #8A127B #8A5D12 #128A21

square

#123F8A #8A127B #8A5D12 #128A21

split-complementary

#123F8A #8A2112 #7B8A12

monochromatic

#040E1E #0B2654 #123F8A #1958C0 #3275E4

Accessibility & contrast

On white

9.98

#123F8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.10

#123F8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #123F8A

9.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##123F8A	#FFFFFF	#000000	##FFFFFF
##123F8A	1.00	9.98	2.10	9.98
#FFFFFF	9.98	1.00	21.00	1.00
#000000	2.10	21.00	1.00	21.00
##FFFFFF	9.98	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#04488D

Deuteranopia (green-blind)

#003D89

Tritanopia (blue-blind)

#00515E

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #123f8a;
/* rgb */ color: rgb(18, 63, 138);
/* oklch */ color: oklch(38.6% 0.134 260.3);

Tailwind

colors: {
  custom: {
    50: '#6873ad',
    500: '#123f8a',
    950: '#000000',
  },
}

SCSS

$custom: #123f8a;
$custom-light: #6873ad;
$custom-dark: #000000;

JSON

{
  "hex": "#123f8a",
  "rgb": {
    "r": 18,
    "g": 63,
    "b": 138
  },
  "hsl": {
    "h": 217.5,
    "s": 76.923,
    "l": 30.588
  },
  "oklch": {
    "l": 0.38581,
    "c": 0.13444,
    "h": 260.3
  },
  "luminance": 0.05519
}

Semantic roles & 50–950 ramp

primary

#123F8A

secondary

#BF8D39

accent

#AC34F3

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#070810

muted

#7A7B7F

Preview Lab

Preview with #123F8A

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

Preview Lab → · Contrast checker → · Palette generator →