#123E5F#123E5F

#123E5F is a dark, moderate cyan. Relative luminance 0.044; OKLCH L 35.2% C 0.074 H 245.2°. Best body text is #FFFFFF at 11.17:1 contrast (WCAG AA passes).

Color values

HEX	#123E5F
RGB	rgb(18, 62, 95)
HSL	hsl(206, 68%, 22%)
HSV	hsv(206, 81%, 37%)
CMYK	cmyk(81.1%, 34.7%, 0%, 62.7%)
CIE-LAB	lab(24.95, -2.06, -23.83)
CIE-LCH	lch(24.95, 23.92, 265.05°)
OKLab	oklab(35.16% -0.0313 -0.0676)
OKLCH	oklch(35.16% 0.074 245.2)
XYZ	xyz(4.0368, 4.3996, 11.4607)
Luminance	0.0440 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#123E5F #5F3312

analogous

#125F5A #123E5F #12185F

triadic

#123E5F #5F123E #3E5F12

tetradic

#123E5F #5A125F #5F3312 #185F12

square

#123E5F #5A125F #5F3312 #185F12

split-complementary

#123E5F #5F1218 #5F5A12

monochromatic

#05111A #081C2C #123E5F #1C6092 #2581C6

Accessibility & contrast

On white

11.17

#123E5F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.88

#123E5F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #123E5F

11.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##123E5F	#FFFFFF	#000000	##FFFFFF
##123E5F	1.00	11.17	1.88	11.17
#FFFFFF	11.17	1.00	21.00	1.00
#000000	1.88	21.00	1.00	21.00
##FFFFFF	11.17	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2F3F60

Deuteranopia (green-blind)

#24385E

Tritanopia (blue-blind)

#00464A

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #123e5f;
/* rgb */ color: rgb(18, 62, 95);
/* oklch */ color: oklch(35.2% 0.074 245.2);

Tailwind

colors: {
  custom: {
    50: '#5d738c',
    500: '#123e5f',
    950: '#000000',
  },
}

SCSS

$custom: #123e5f;
$custom-light: #5d738c;
$custom-dark: #000000;

JSON

{
  "hex": "#123e5f",
  "rgb": {
    "r": 18,
    "g": 62,
    "b": 95
  },
  "hsl": {
    "h": 205.714,
    "s": 68.142,
    "l": 22.157
  },
  "oklch": {
    "l": 0.35163,
    "c": 0.07449,
    "h": 245.2
  },
  "luminance": 0.044
}

Semantic roles & 50–950 ramp

primary

#123E5F

secondary

#975F36

accent

#873DEB

background

#F5F6F8

surface

#E9ECF0

border

#C5C7CB

text

#05080C

muted

#797B7D

Preview Lab

Preview with #123E5F

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

Preview Lab → · Contrast checker → · Palette generator →