#123A7D#123A7D

#123A7D is a dark, vivid blue. Relative luminance 0.046; OKLCH L 36.4% C 0.122 H 260.3°. Best body text is #FFFFFF at 10.90:1 contrast (WCAG AA passes).

Color values

HEX	#123A7D
RGB	rgb(18, 58, 125)
HSL	hsl(218, 75%, 28%)
HSV	hsv(218, 86%, 49%)
CMYK	cmyk(85.6%, 53.6%, 0%, 51%)
CIE-LAB	lab(25.67, 13.36, -41.86)
CIE-LCH	lch(25.67, 43.94, 287.70°)
OKLab	oklab(36.36% -0.0207 -0.1206)
OKLCH	oklch(36.36% 0.122 260.3)
XYZ	xyz(5.4628, 4.6347, 20.0047)
Luminance	0.0464 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#123A7D #7D5512

analogous

#126F7D #123A7D #1F127D

triadic

#123A7D #7D123A #3A7D12

tetradic

#123A7D #7D126F #7D5512 #127D1F

square

#123A7D #7D126F #7D5512 #127D1F

split-complementary

#123A7D #7D1F12 #6F7D12

monochromatic

#040C1B #0A2148 #123A7D #1A53B2 #296EE0

Accessibility & contrast

On white

10.90

#123A7D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.93

#123A7D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #123A7D

10.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##123A7D	#FFFFFF	#000000	##FFFFFF
##123A7D	1.00	10.90	1.93	10.90
#FFFFFF	10.90	1.00	21.00	1.00
#000000	1.93	21.00	1.00	21.00
##FFFFFF	10.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0B427F

Deuteranopia (green-blind)

#00387C

Tritanopia (blue-blind)

#004A55

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #123a7d;
/* rgb */ color: rgb(18, 58, 125);
/* oklch */ color: oklch(36.4% 0.122 260.3);

Tailwind

colors: {
  custom: {
    50: '#646fa3',
    500: '#123a7d',
    950: '#000000',
  },
}

SCSS

$custom: #123a7d;
$custom-light: #646fa3;
$custom-dark: #000000;

JSON

{
  "hex": "#123a7d",
  "rgb": {
    "r": 18,
    "g": 58,
    "b": 125
  },
  "hsl": {
    "h": 217.57,
    "s": 74.825,
    "l": 28.039
  },
  "oklch": {
    "l": 0.36362,
    "c": 0.1224,
    "h": 260.3
  },
  "luminance": 0.04635
}

Semantic roles & 50–950 ramp

primary

#123A7D

secondary

#B38538

accent

#AC36F1

background

#F6F6FA

surface

#EBECF4

border

#C6C7CE

text

#06070F

muted

#7A7A7F

Preview Lab

Preview with #123A7D

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

Preview Lab → · Contrast checker → · Palette generator →