#123B5B#123B5B
#123B5B is a dark, moderate cyan. Relative luminance 0.040; OKLCH L 34.1% C 0.072 H 245.9°. Best body text is #FFFFFF at 11.65:1 contrast (WCAG AA passes).
Color values
| HEX | #123B5B |
|---|---|
| RGB | rgb(18, 59, 91) |
| HSL | hsl(206, 67%, 21%) |
| HSV | hsv(206, 80%, 36%) |
| CMYK | cmyk(80.2%, 35.2%, 0%, 64.3%) |
| CIE-LAB | lab(23.71, -1.69, -23.18) |
| CIE-LCH | lch(23.71, 23.24, 265.83°) |
| OKLab | oklab(34.11% -0.0294 -0.0658) |
| OKLCH | oklch(34.11% 0.072 245.9) |
| XYZ | xyz(3.7010, 4.0114, 10.4747) |
| Luminance | 0.0401 (WCAG relative) |
| Temperature | cool |
| Family | cyan |
Closest named colors
Marine Blue
#01386A
ΔE00 3.72
Dark Slate Blue
#214761
ΔE00 4.69
Prussian Blue
#004577
ΔE00 4.75
Twilight Blue
#0A437A
ΔE00 4.96
Dark Blue Grey
#1F3B4D
ΔE00 5.31
Dark Grey Blue
#29465B
ΔE00 5.45
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#123B5B #5B3212
analogous
#125B57 #123B5B #12175B
triadic
#123B5B #5B123B #3B5B12
tetradic
#123B5B #57125B #5B3212 #175B12
square
#123B5B #57125B #5B3212 #175B12
split-complementary
#123B5B #5B1217 #5B5712
monochromatic
#05111A #081A28 #123B5B #1C5C8E #267DC1
Accessibility & contrast
On white
11.65
#123B5B on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
1.80
#123B5B on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #123B5B
11.65:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##123B5B | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##123B5B | 1.00 | 11.65 | 1.80 | 11.65 |
| #FFFFFF | 11.65 | 1.00 | 21.00 | 1.00 |
| #000000 | 1.80 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 11.65 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#2C3C5C
Deuteranopia (green-blind)
#22355A
Tritanopia (blue-blind)
#004346
Achromatopsia (no color)
#383838
Design tokens & code
CSS
--color: #123b5b; /* rgb */ color: rgb(18, 59, 91); /* oklch */ color: oklch(34.1% 0.072 245.9);
Tailwind
colors: {
custom: {
50: '#5c7089',
500: '#123b5b',
950: '#000000',
},
}SCSS
$custom: #123b5b; $custom-light: #5c7089; $custom-dark: #000000;
JSON
{
"hex": "#123b5b",
"rgb": {
"r": 18,
"g": 59,
"b": 91
},
"hsl": {
"h": 206.301,
"s": 66.972,
"l": 21.373
},
"oklch": {
"l": 0.34109,
"c": 0.07203,
"h": 245.9
},
"luminance": 0.04012
}Semantic roles & 50–950 ramp
primary
#123B5B
secondary
#935F35
accent
#893EEA
background
#F5F6F8
surface
#E9ECF0
border
#C5C7CB
text
#04070B
muted
#797A7C