#123F6F#123F6F

#123F6F is a dark, moderate cyan. Relative luminance 0.048; OKLCH L 36.5% C 0.096 H 253.3°. Best body text is #FFFFFF at 10.68:1 contrast (WCAG AA passes).

Color values

HEX	#123F6F
RGB	rgb(18, 63, 111)
HSL	hsl(211, 72%, 25%)
HSV	hsv(211, 84%, 44%)
CMYK	cmyk(83.8%, 43.2%, 0%, 56.5%)
CIE-LAB	lab(26.25, 3.93, -32.06)
CIE-LCH	lch(26.25, 32.30, 276.99°)
OKLab	oklab(36.49% -0.0276 -0.0917)
OKLCH	oklch(36.49% 0.096 253.3)
XYZ	xyz(4.8951, 4.8307, 15.7103)
Luminance	0.0483 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#123F6F #6F4212

analogous

#126D6F #123F6F #14126F

triadic

#123F6F #6F123F #3F6F12

tetradic

#123F6F #6F126D #6F4212 #126F14

square

#123F6F #6F126D #6F4212 #126F14

split-complementary

#123F6F #6F1412 #6D6F12

monochromatic

#040F1A #09213A #123F6F #1B5DA4 #237BD8

Accessibility & contrast

On white

10.68

#123F6F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.97

#123F6F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #123F6F

10.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##123F6F	#FFFFFF	#000000	##FFFFFF
##123F6F	1.00	10.68	1.97	10.68
#FFFFFF	10.68	1.00	21.00	1.00
#000000	1.97	21.00	1.00	21.00
##FFFFFF	10.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#274371

Deuteranopia (green-blind)

#173A6E

Tritanopia (blue-blind)

#004A51

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #123f6f;
/* rgb */ color: rgb(18, 63, 111);
/* oklch */ color: oklch(36.5% 0.096 253.3);

Tailwind

colors: {
  custom: {
    50: '#617398',
    500: '#123f6f',
    950: '#000000',
  },
}

SCSS

$custom: #123f6f;
$custom-light: #617398;
$custom-dark: #000000;

JSON

{
  "hex": "#123f6f",
  "rgb": {
    "r": 18,
    "g": 63,
    "b": 111
  },
  "hsl": {
    "h": 210.968,
    "s": 72.093,
    "l": 25.294
  },
  "oklch": {
    "l": 0.36493,
    "c": 0.09577,
    "h": 253.3
  },
  "luminance": 0.04831
}

Semantic roles & 50–950 ramp

primary

#123F6F

secondary

#A67037

accent

#9739EF

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06080E

muted

#7A7B7E

Preview Lab

Preview with #123F6F

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

Preview Lab → · Contrast checker → · Palette generator →