#123A7F#123A7F

#123A7F is a dark, vivid blue. Relative luminance 0.047; OKLCH L 36.5% C 0.125 H 260.6°. Best body text is #FFFFFF at 10.84:1 contrast (WCAG AA passes).

Color values

HEX	#123A7F
RGB	rgb(18, 58, 127)
HSL	hsl(218, 75%, 28%)
HSV	hsv(218, 86%, 50%)
CMYK	cmyk(85.8%, 54.3%, 0%, 50.2%)
CIE-LAB	lab(25.82, 14.20, -42.87)
CIE-LCH	lch(25.82, 45.16, 288.33°)
OKLab	oklab(36.53% -0.0204 -0.1236)
OKLCH	oklch(36.53% 0.125 260.6)
XYZ	xyz(5.5919, 4.6863, 20.6844)
Luminance	0.0469 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#123A7F #7F5712

analogous

#12707F #123A7F #21127F

triadic

#123A7F #7F123A #3A7F12

tetradic

#123A7F #7F1270 #7F5712 #127F21

square

#123A7F #7F1270 #7F5712 #127F21

split-complementary

#123A7F #7F2112 #707F12

monochromatic

#040C1B #0A2249 #123A7F #1A52B5 #2B6DE1

Accessibility & contrast

On white

10.84

#123A7F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.94

#123A7F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #123A7F

10.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##123A7F	#FFFFFF	#000000	##FFFFFF
##123A7F	1.00	10.84	1.94	10.84
#FFFFFF	10.84	1.00	21.00	1.00
#000000	1.94	21.00	1.00	21.00
##FFFFFF	10.84	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#074281

Deuteranopia (green-blind)

#00387E

Tritanopia (blue-blind)

#004B56

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #123a7f;
/* rgb */ color: rgb(18, 58, 127);
/* oklch */ color: oklch(36.5% 0.125 260.6);

Tailwind

colors: {
  custom: {
    50: '#656fa5',
    500: '#123a7f',
    950: '#000000',
  },
}

SCSS

$custom: #123a7f;
$custom-light: #656fa5;
$custom-dark: #000000;

JSON

{
  "hex": "#123a7f",
  "rgb": {
    "r": 18,
    "g": 58,
    "b": 127
  },
  "hsl": {
    "h": 217.982,
    "s": 75.172,
    "l": 28.431
  },
  "oklch": {
    "l": 0.36529,
    "c": 0.12529,
    "h": 260.6
  },
  "luminance": 0.04687
}

Semantic roles & 50–950 ramp

primary

#123A7F

secondary

#B58738

accent

#AD36F2

background

#F6F6FA

surface

#EBECF4

border

#C6C7CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #123A7F

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

Preview Lab → · Contrast checker → · Palette generator →