#123C7F#123C7F

#123C7F is a dark, vivid blue. Relative luminance 0.049; OKLCH L 37.0% C 0.123 H 259.7°. Best body text is #FFFFFF at 10.61:1 contrast (WCAG AA passes).

Color values

HEX	#123C7F
RGB	rgb(18, 60, 127)
HSL	hsl(217, 75%, 28%)
HSV	hsv(217, 86%, 50%)
CMYK	cmyk(85.8%, 52.8%, 0%, 50.2%)
CIE-LAB	lab(26.42, 12.79, -41.89)
CIE-LCH	lch(26.42, 43.80, 286.97°)
OKLab	oklab(36.99% -0.0219 -0.1207)
OKLCH	oklch(36.99% 0.123 259.7)
XYZ	xyz(5.6947, 4.8919, 20.7187)
Luminance	0.0489 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#123C7F #7F5512

analogous

#12727F #123C7F #1F127F

triadic

#123C7F #7F123C #3C7F12

tetradic

#123C7F #7F1272 #7F5512 #127F1F

square

#123C7F #7F1272 #7F5512 #127F1F

split-complementary

#123C7F #7F1F12 #727F12

monochromatic

#040D1B #0A2349 #123C7F #1A55B5 #2B71E1

Accessibility & contrast

On white

10.61

#123C7F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.98

#123C7F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #123C7F

10.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##123C7F	#FFFFFF	#000000	##FFFFFF
##123C7F	1.00	10.61	1.98	10.61
#FFFFFF	10.61	1.00	21.00	1.00
#000000	1.98	21.00	1.00	21.00
##FFFFFF	10.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#104481

Deuteranopia (green-blind)

#003A7E

Tritanopia (blue-blind)

#004C57

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #123c7f;
/* rgb */ color: rgb(18, 60, 127);
/* oklch */ color: oklch(37.0% 0.123 259.7);

Tailwind

colors: {
  custom: {
    50: '#6571a5',
    500: '#123c7f',
    950: '#000000',
  },
}

SCSS

$custom: #123c7f;
$custom-light: #6571a5;
$custom-dark: #000000;

JSON

{
  "hex": "#123c7f",
  "rgb": {
    "r": 18,
    "g": 60,
    "b": 127
  },
  "hsl": {
    "h": 216.881,
    "s": 75.172,
    "l": 28.431
  },
  "oklch": {
    "l": 0.36989,
    "c": 0.12267,
    "h": 259.7
  },
  "luminance": 0.04893
}

Semantic roles & 50–950 ramp

primary

#123C7F

secondary

#B58538

accent

#A936F2

background

#F6F6FA

surface

#EBECF4

border

#C6C7CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #123C7F

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

Preview Lab → · Contrast checker → · Palette generator →