#183A4B#183A4B
#183A4B is a dark, muted cyan. Relative luminance 0.037; OKLCH L 33.1% C 0.050 H 232.7°. Best body text is #FFFFFF at 12.03:1 contrast (WCAG AA passes).
Color values
| HEX | #183A4B |
|---|---|
| RGB | rgb(24, 58, 75) |
| HSL | hsl(200, 52%, 19%) |
| HSV | hsv(200, 68%, 29%) |
| CMYK | cmyk(68%, 22.7%, 0%, 70.6%) |
| CIE-LAB | lab(22.75, -6.27, -14.10) |
| CIE-LCH | lch(22.75, 15.43, 246.03°) |
| OKLab | oklab(33.14% -0.03 -0.0394) |
| OKLCH | oklch(33.14% 0.05 232.7) |
| XYZ | xyz(3.1593, 3.7280, 7.2083) |
| Luminance | 0.0373 (WCAG relative) |
| Temperature | cool |
| Family | cyan |
Closest named colors
Dark Blue Grey
#1F3B4D
ΔE00 1.86
Dark Grey Blue
#29465B
ΔE00 4.85
Dark Slate Blue
#214761
ΔE00 5.60
Charcoal
#36454F
ΔE00 6.32
Gunmetal
#2A3439
ΔE00 7.25
Dark
#1B2431
ΔE00 9.72
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#183A4B #4B2918
analogous
#184B43 #183A4B #18214B
triadic
#183A4B #4B183A #3A4B18
tetradic
#183A4B #43184B #4B2918 #214B18
square
#183A4B #43184B #4B2918 #214B18
split-complementary
#183A4B #4B1821 #4B4318
monochromatic
#071217 #09161D #183A4B #275E79 #3682A8
Accessibility & contrast
On white
12.03
#183A4B on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
1.75
#183A4B on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #183A4B
12.03:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##183A4B | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##183A4B | 1.00 | 12.03 | 1.75 | 12.03 |
| #FFFFFF | 12.03 | 1.00 | 21.00 | 1.00 |
| #000000 | 1.75 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 12.03 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#32394C
Deuteranopia (green-blind)
#2B344B
Tritanopia (blue-blind)
#003F40
Achromatopsia (no color)
#363636
Design tokens & code
CSS
--color: #183a4b; /* rgb */ color: rgb(24, 58, 75); /* oklch */ color: oklch(33.1% 0.050 232.7);
Tailwind
colors: {
custom: {
50: '#5b707d',
500: '#183a4b',
950: '#000000',
},
}SCSS
$custom: #183a4b; $custom-light: #5b707d; $custom-dark: #000000;
JSON
{
"hex": "#183a4b",
"rgb": {
"r": 24,
"g": 58,
"b": 75
},
"hsl": {
"h": 200,
"s": 51.515,
"l": 19.412
},
"oklch": {
"l": 0.33138,
"c": 0.04953,
"h": 232.7
},
"luminance": 0.03728
}Semantic roles & 50–950 ramp
primary
#183A4B
secondary
#82543D
accent
#7C4DDB
background
#F5F6F7
surface
#E9ECEE
border
#C5C7C9
text
#040709
muted
#797A7B