#173757#173757
#173757 is a dark, moderate cyan. Relative luminance 0.036; OKLCH L 33.0% C 0.068 H 250.7°. Best body text is #FFFFFF at 12.21:1 contrast (WCAG AA passes).
Color values
| HEX | #173757 |
|---|---|
| RGB | rgb(23, 55, 87) |
| HSL | hsl(210, 58%, 22%) |
| HSV | hsv(210, 74%, 34%) |
| CMYK | cmyk(73.6%, 36.8%, 0%, 65.9%) |
| CIE-LAB | lab(22.31, 0.25, -22.74) |
| CIE-LCH | lch(22.31, 22.74, 270.62°) |
| OKLab | oklab(32.99% -0.0226 -0.0645) |
| OKLCH | oklch(32.99% 0.068 250.7) |
| XYZ | xyz(3.4392, 3.6023, 9.5290) |
| Luminance | 0.0360 (WCAG relative) |
| Temperature | cool |
| Family | cyan |
Closest named colors
Marine Blue
#01386A
ΔE00 3.49
Marine
#042E60
ΔE00 4.48
Twilight Blue
#0A437A
ΔE00 5.86
Prussian Blue
#004577
ΔE00 6.14
Navy Blue
#1B2A4A
ΔE00 6.16
Dark Blue Grey
#1F3B4D
ΔE00 6.31
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#173757 #573717
analogous
#175757 #173757 #171757
triadic
#173757 #571737 #375717
tetradic
#173757 #571757 #573717 #175717
square
#173757 #571757 #573717 #175717
split-complementary
#173757 #571717 #575717
monochromatic
#060F18 #0A1827 #173757 #245687 #3174B8
Accessibility & contrast
On white
12.21
#173757 on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
1.72
#173757 on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #173757
12.21:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##173757 | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##173757 | 1.00 | 12.21 | 1.72 | 12.21 |
| #FFFFFF | 12.21 | 1.00 | 21.00 | 1.00 |
| #000000 | 1.72 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 12.21 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#293958
Deuteranopia (green-blind)
#203356
Tritanopia (blue-blind)
#003F43
Achromatopsia (no color)
#353535
Design tokens & code
CSS
--color: #173757; /* rgb */ color: rgb(23, 55, 87); /* oklch */ color: oklch(33.0% 0.068 250.7);
Tailwind
colors: {
custom: {
50: '#5d6d86',
500: '#173757',
950: '#000000',
},
}SCSS
$custom: #173757; $custom-light: #5d6d86; $custom-dark: #000000;
JSON
{
"hex": "#173757",
"rgb": {
"r": 23,
"g": 55,
"b": 87
},
"hsl": {
"h": 210,
"s": 58.182,
"l": 21.569
},
"oklch": {
"l": 0.32986,
"c": 0.06835,
"h": 250.7
},
"luminance": 0.03603
}Semantic roles & 50–950 ramp
primary
#173757
secondary
#8E653C
accent
#9446E1
background
#F5F6F8
surface
#E9EBEF
border
#C5C6CA
text
#04070B
muted
#797A7C