#123B5F#123B5F

#123B5F is a dark, moderate cyan. Relative luminance 0.041; OKLCH L 34.4% C 0.078 H 248.8°. Best body text is #FFFFFF at 11.56:1 contrast (WCAG AA passes).

Color values

HEX	#123B5F
RGB	rgb(18, 59, 95)
HSL	hsl(208, 68%, 22%)
HSV	hsv(208, 81%, 37%)
CMYK	cmyk(81.1%, 37.9%, 0%, 62.7%)
CIE-LAB	lab(23.94, -0.03, -25.42)
CIE-LCH	lch(23.94, 25.42, 269.94°)
OKLab	oklab(34.37% -0.0281 -0.0723)
OKLCH	oklch(34.37% 0.078 248.8)
XYZ	xyz(3.8782, 4.0823, 11.4078)
Luminance	0.0408 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#123B5F #5F3612

analogous

#125F5D #123B5F #12145F

triadic

#123B5F #5F123B #3B5F12

tetradic

#123B5F #5D125F #5F3612 #145F12

square

#123B5F #5D125F #5F3612 #145F12

split-complementary

#123B5F #5F1214 #5F5D12

monochromatic

#05101A #081B2C #123B5F #1C5B92 #257BC6

Accessibility & contrast

On white

11.56

#123B5F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.82

#123B5F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #123B5F

11.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##123B5F	#FFFFFF	#000000	##FFFFFF
##123B5F	1.00	11.56	1.82	11.56
#FFFFFF	11.56	1.00	21.00	1.00
#000000	1.82	21.00	1.00	21.00
##FFFFFF	11.56	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2A3D61

Deuteranopia (green-blind)

#1F365E

Tritanopia (blue-blind)

#004448

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #123b5f;
/* rgb */ color: rgb(18, 59, 95);
/* oklch */ color: oklch(34.4% 0.078 248.8);

Tailwind

colors: {
  custom: {
    50: '#5d708c',
    500: '#123b5f',
    950: '#000000',
  },
}

SCSS

$custom: #123b5f;
$custom-light: #5d708c;
$custom-dark: #000000;

JSON

{
  "hex": "#123b5f",
  "rgb": {
    "r": 18,
    "g": 59,
    "b": 95
  },
  "hsl": {
    "h": 208.052,
    "s": 68.142,
    "l": 22.157
  },
  "oklch": {
    "l": 0.34368,
    "c": 0.07759,
    "h": 248.8
  },
  "luminance": 0.04083
}

Semantic roles & 50–950 ramp

primary

#123B5F

secondary

#976336

accent

#8E3DEB

background

#F5F6F8

surface

#E9ECF0

border

#C5C7CB

text

#05070C

muted

#797A7D

Preview Lab

Preview with #123B5F

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

Preview Lab → · Contrast checker → · Palette generator →