#155B6B#155B6B
#155B6B is a dark, moderate cyan. Relative luminance 0.087; OKLCH L 43.7% C 0.070 H 217.0°. Best body text is #FFFFFF at 7.66:1 contrast (WCAG AA passes).
Color values
| HEX | #155B6B |
|---|---|
| RGB | rgb(21, 91, 107) |
| HSL | hsl(191, 67%, 25%) |
| HSV | hsv(191, 80%, 42%) |
| CMYK | cmyk(80.4%, 15%, 0%, 58%) |
| CIE-LAB | lab(35.40, -14.99, -15.20) |
| CIE-LCH | lch(35.40, 21.35, 225.39°) |
| OKLab | oklab(43.71% -0.0563 -0.0424) |
| OKLCH | oklch(43.71% 0.07 217) |
| XYZ | xyz(6.7031, 8.7023, 15.2335) |
| Luminance | 0.0870 (WCAG relative) |
| Temperature | cool |
| Family | cyan |
Closest named colors
Petrol
#005F6A
ΔE00 3.66
Deep Teal
#00555A
ΔE00 6.22
Darkslategray
#2F4F4F
ΔE00 8.43
Dark Aqua
#05696B
ΔE00 8.89
Dark Teal
#014D4E
ΔE00 8.90
Dark Turquoise
#045C5A
ΔE00 9.30
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#155B6B #6B2515
analogous
#156B50 #155B6B #15306B
triadic
#155B6B #6B155B #5B6B15
tetradic
#155B6B #50156B #6B2515 #306B15
square
#155B6B #50156B #6B2515 #306B15
split-complementary
#155B6B #6B1530 #6B5015
monochromatic
#05161A #0B2F38 #155B6B #1F879E #29B2D1
Accessibility & contrast
On white
7.66
#155B6B on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
2.74
#155B6B on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #155B6B
7.66:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##155B6B | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##155B6B | 1.00 | 7.66 | 2.74 | 7.66 |
| #FFFFFF | 7.66 | 1.00 | 21.00 | 1.00 |
| #000000 | 2.74 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 7.66 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#50586C
Deuteranopia (green-blind)
#45506B
Tritanopia (blue-blind)
#006160
Achromatopsia (no color)
#535353
Design tokens & code
CSS
--color: #155b6b; /* rgb */ color: rgb(21, 91, 107); /* oklch */ color: oklch(43.7% 0.070 217.0);
Tailwind
colors: {
custom: {
50: '#628995',
500: '#155b6b',
950: '#000000',
},
}SCSS
$custom: #155b6b; $custom-light: #628995; $custom-dark: #000000;
JSON
{
"hex": "#155b6b",
"rgb": {
"r": 21,
"g": 91,
"b": 107
},
"hsl": {
"h": 191.163,
"s": 67.188,
"l": 25.098
},
"oklch": {
"l": 0.43714,
"c": 0.07049,
"h": 217
},
"luminance": 0.08703
}Semantic roles & 50–950 ramp
primary
#155B6B
secondary
#A24D3A
accent
#5E3EEA
background
#F6F8F9
surface
#EBF0F1
border
#C6CBCB
text
#060B0D
muted
#7A7C7E