#18577B#18577B
#18577B is a dark, moderate cyan. Relative luminance 0.084; OKLCH L 43.6% C 0.086 H 238.9°. Best body text is #FFFFFF at 7.81:1 contrast (WCAG AA passes).
Color values
| HEX | #18577B |
|---|---|
| RGB | rgb(24, 87, 123) |
| HSL | hsl(202, 67%, 29%) |
| HSV | hsv(202, 80%, 48%) |
| CMYK | cmyk(80.5%, 29.3%, 0%, 51.8%) |
| CIE-LAB | lab(34.88, -6.22, -25.92) |
| CIE-LCH | lch(34.88, 26.65, 256.51°) |
| OKLab | oklab(43.56% -0.0443 -0.0733) |
| OKLCH | oklch(43.56% 0.086 238.9) |
| XYZ | xyz(7.3586, 8.4398, 19.9763) |
| Luminance | 0.0844 (WCAG relative) |
| Temperature | cool |
| Family | cyan |
Closest named colors
Deep Sea Blue
#015482
ΔE00 2.48
Light Navy
#155084
ΔE00 4.90
Light Navy Blue
#2E5A88
ΔE00 4.94
Ugly Blue
#31668A
ΔE00 5.43
Peacock Blue
#016795
ΔE00 5.87
Dark Slate Blue
#214761
ΔE00 5.99
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#18577B #7B3C18
analogous
#187B6E #18577B #18267B
triadic
#18577B #7B1857 #577B18
tetradic
#18577B #6E187B #7B3C18 #267B18
square
#18577B #6E187B #7B3C18 #267B18
split-complementary
#18577B #7B1826 #7B6E18
monochromatic
#05121A #0E3348 #18577B #227BAE #369DD8
Accessibility & contrast
On white
7.81
#18577B on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
2.69
#18577B on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #18577B
7.81:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##18577B | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##18577B | 1.00 | 7.81 | 2.69 | 7.81 |
| #FFFFFF | 7.81 | 1.00 | 21.00 | 1.00 |
| #000000 | 2.69 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 7.81 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#46577D
Deuteranopia (green-blind)
#394E7A
Tritanopia (blue-blind)
#006064
Achromatopsia (no color)
#525252
Design tokens & code
CSS
--color: #18577b; /* rgb */ color: rgb(24, 87, 123); /* oklch */ color: oklch(43.6% 0.086 238.9);
Tailwind
colors: {
custom: {
50: '#6686a1',
500: '#18577b',
950: '#000000',
},
}SCSS
$custom: #18577b; $custom-light: #6686a1; $custom-dark: #000000;
JSON
{
"hex": "#18577b",
"rgb": {
"r": 24,
"g": 87,
"b": 123
},
"hsl": {
"h": 201.818,
"s": 67.347,
"l": 28.824
},
"oklch": {
"l": 0.43558,
"c": 0.08562,
"h": 238.9
},
"luminance": 0.08441
}Semantic roles & 50–950 ramp
primary
#18577B
secondary
#B0683F
accent
#7C3EEA
background
#F6F8F9
surface
#EBEFF2
border
#C6CACC
text
#070B0F
muted
#7A7C7E