#123F57#123F57

#123F57 is a dark, moderate cyan. Relative luminance 0.044; OKLCH L 35.0% C 0.064 H 236.3°. Best body text is #FFFFFF at 11.20:1 contrast (WCAG AA passes).

Color values

HEX	#123F57
RGB	rgb(18, 63, 87)
HSL	hsl(201, 66%, 21%)
HSV	hsv(201, 79%, 34%)
CMYK	cmyk(79.3%, 27.6%, 0%, 65.9%)
CIE-LAB	lab(24.86, -5.97, -18.75)
CIE-LCH	lch(24.86, 19.68, 252.35°)
OKLab	oklab(34.95% -0.0353 -0.0528)
OKLCH	oklch(34.95% 0.064 236.3)
XYZ	xyz(3.7466, 4.3713, 9.6613)
Luminance	0.0437 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#123F57 #572A12

analogous

#12574C #123F57 #121C57

triadic

#123F57 #57123F #3F5712

tetradic

#123F57 #4C1257 #572A12 #1C5712

square

#123F57 #4C1257 #572A12 #1C5712

split-complementary

#123F57 #57121C #574C12

monochromatic

#051219 #081A24 #123F57 #1C648A #2788BC

Accessibility & contrast

On white

11.20

#123F57 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.87

#123F57 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #123F57

11.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##123F57	#FFFFFF	#000000	##FFFFFF
##123F57	1.00	11.20	1.87	11.20
#FFFFFF	11.20	1.00	21.00	1.00
#000000	1.87	21.00	1.00	21.00
##FFFFFF	11.20	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#333F58

Deuteranopia (green-blind)

#2A3857

Tritanopia (blue-blind)

#004547

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #123f57;
/* rgb */ color: rgb(18, 63, 87);
/* oklch */ color: oklch(35.0% 0.064 236.3);

Tailwind

colors: {
  custom: {
    50: '#5b7486',
    500: '#123f57',
    950: '#000000',
  },
}

SCSS

$custom: #123f57;
$custom-light: #5b7486;
$custom-dark: #000000;

JSON

{
  "hex": "#123f57",
  "rgb": {
    "r": 18,
    "g": 63,
    "b": 87
  },
  "hsl": {
    "h": 200.87,
    "s": 65.714,
    "l": 20.588
  },
  "oklch": {
    "l": 0.34952,
    "c": 0.06353,
    "h": 236.3
  },
  "luminance": 0.04372
}

Semantic roles & 50–950 ramp

primary

#123F57

secondary

#905535

accent

#7A3FE9

background

#F5F7F8

surface

#E9EDEF

border

#C5C8CA

text

#04080B

muted

#797B7C

Preview Lab

Preview with #123F57

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

Preview Lab → · Contrast checker → · Palette generator →