#123E57#123E57

#123E57 is a dark, moderate cyan. Relative luminance 0.043; OKLCH L 34.7% C 0.064 H 237.9°. Best body text is #FFFFFF at 11.34:1 contrast (WCAG AA passes).

Color values

HEX	#123E57
RGB	rgb(18, 62, 87)
HSL	hsl(202, 66%, 21%)
HSV	hsv(202, 79%, 34%)
CMYK	cmyk(79.3%, 28.7%, 0%, 65.9%)
CIE-LAB	lab(24.52, -5.32, -19.29)
CIE-LCH	lch(24.52, 20.01, 254.59°)
OKLab	oklab(34.68% -0.0341 -0.0544)
OKLCH	oklch(34.68% 0.064 237.9)
XYZ	xyz(3.6917, 4.2615, 9.6430)
Luminance	0.0426 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#123E57 #572B12

analogous

#12574D #123E57 #121B57

triadic

#123E57 #57123E #3E5712

tetradic

#123E57 #4D1257 #572B12 #1B5712

square

#123E57 #4D1257 #572B12 #1B5712

split-complementary

#123E57 #57121B #574D12

monochromatic

#051219 #081A24 #123E57 #1C628A #2786BC

Accessibility & contrast

On white

11.34

#123E57 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.85

#123E57 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #123E57

11.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##123E57	#FFFFFF	#000000	##FFFFFF
##123E57	1.00	11.34	1.85	11.34
#FFFFFF	11.34	1.00	21.00	1.00
#000000	1.85	21.00	1.00	21.00
##FFFFFF	11.34	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#323E58

Deuteranopia (green-blind)

#293757

Tritanopia (blue-blind)

#004447

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #123e57;
/* rgb */ color: rgb(18, 62, 87);
/* oklch */ color: oklch(34.7% 0.064 237.9);

Tailwind

colors: {
  custom: {
    50: '#5b7386',
    500: '#123e57',
    950: '#000000',
  },
}

SCSS

$custom: #123e57;
$custom-light: #5b7386;
$custom-dark: #000000;

JSON

{
  "hex": "#123e57",
  "rgb": {
    "r": 18,
    "g": 62,
    "b": 87
  },
  "hsl": {
    "h": 201.739,
    "s": 65.714,
    "l": 20.588
  },
  "oklch": {
    "l": 0.34678,
    "c": 0.06424,
    "h": 237.9
  },
  "luminance": 0.04262
}

Semantic roles & 50–950 ramp

primary

#123E57

secondary

#905635

accent

#7D3FE9

background

#F5F6F8

surface

#E9ECEF

border

#C5C7CA

text

#04080B

muted

#797B7C

Preview Lab

Preview with #123E57

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

Preview Lab → · Contrast checker → · Palette generator →