#123A7C#123A7C

#123A7C is a dark, vivid blue. Relative luminance 0.046; OKLCH L 36.3% C 0.121 H 260.1°. Best body text is #FFFFFF at 10.93:1 contrast (WCAG AA passes).

Color values

HEX	#123A7C
RGB	rgb(18, 58, 124)
HSL	hsl(217, 75%, 28%)
HSV	hsv(217, 85%, 49%)
CMYK	cmyk(85.5%, 53.2%, 0%, 51.4%)
CIE-LAB	lab(25.59, 12.93, -41.35)
CIE-LCH	lch(25.59, 43.33, 287.37°)
OKLab	oklab(36.28% -0.0208 -0.1191)
OKLCH	oklch(36.28% 0.121 260.1)
XYZ	xyz(5.3993, 4.6093, 19.6700)
Luminance	0.0461 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#123A7C #7C5412

analogous

#126F7C #123A7C #1F127C

triadic

#123A7C #7C123A #3A7C12

tetradic

#123A7C #7C126F #7C5412 #127C1F

square

#123A7C #7C126F #7C5412 #127C1F

split-complementary

#123A7C #7C1F12 #6F7C12

monochromatic

#040C1B #0A2147 #123A7C #1A53B1 #296EE0

Accessibility & contrast

On white

10.93

#123A7C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.92

#123A7C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #123A7C

10.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##123A7C	#FFFFFF	#000000	##FFFFFF
##123A7C	1.00	10.93	1.92	10.93
#FFFFFF	10.93	1.00	21.00	1.00
#000000	1.92	21.00	1.00	21.00
##FFFFFF	10.93	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0D427E

Deuteranopia (green-blind)

#00387B

Tritanopia (blue-blind)

#004A55

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #123a7c;
/* rgb */ color: rgb(18, 58, 124);
/* oklch */ color: oklch(36.3% 0.121 260.1);

Tailwind

colors: {
  custom: {
    50: '#646fa2',
    500: '#123a7c',
    950: '#000000',
  },
}

SCSS

$custom: #123a7c;
$custom-light: #646fa2;
$custom-dark: #000000;

JSON

{
  "hex": "#123a7c",
  "rgb": {
    "r": 18,
    "g": 58,
    "b": 124
  },
  "hsl": {
    "h": 217.358,
    "s": 74.648,
    "l": 27.843
  },
  "oklch": {
    "l": 0.3628,
    "c": 0.12096,
    "h": 260.1
  },
  "luminance": 0.0461
}

Semantic roles & 50–950 ramp

primary

#123A7C

secondary

#B28438

accent

#AB37F1

background

#F6F6FA

surface

#EBECF4

border

#C6C7CE

text

#06070F

muted

#7A7A7F

Preview Lab

Preview with #123A7C

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

Preview Lab → · Contrast checker → · Palette generator →