#1D588B#1D588B
#1D588B is a dark, moderate cyan. Relative luminance 0.091; OKLCH L 44.9% C 0.103 H 248.6°. Best body text is #FFFFFF at 7.44:1 contrast (WCAG AA passes).
Color values
| HEX | #1D588B |
|---|---|
| RGB | rgb(29, 88, 139) |
| HSL | hsl(208, 65%, 33%) |
| HSV | hsv(208, 79%, 55%) |
| CMYK | cmyk(79.1%, 36.7%, 0%, 45.5%) |
| CIE-LAB | lab(36.18, 0.02, -33.67) |
| CIE-LCH | lch(36.18, 33.67, 270.03°) |
| OKLab | oklab(44.9% -0.0375 -0.0958) |
| OKLCH | oklch(44.9% 0.103 248.6) |
| XYZ | xyz(8.6548, 9.1037, 25.7221) |
| Luminance | 0.0911 (WCAG relative) |
| Temperature | cool |
| Family | cyan |
Closest named colors
Light Navy Blue
#2E5A88
ΔE00 1.86
Light Navy
#155084
ΔE00 2.72
Deep Sea Blue
#015482
ΔE00 2.84
Dusk Blue
#26538D
ΔE00 3.07
Denim (survey)
#3B638C
ΔE00 4.54
Denim Blue
#3B5B92
ΔE00 4.89
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#1D588B #8B501D
analogous
#1D8B87 #1D588B #1D218B
triadic
#1D588B #8B1D58 #588B1D
tetradic
#1D588B #871D8B #8B501D #218B1D
square
#1D588B #871D8B #8B501D #218B1D
split-complementary
#1D588B #8B1D21 #8B871D
monochromatic
#081826 #123858 #1D588B #2878BE #4996D9
Accessibility & contrast
On white
7.44
#1D588B on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
2.82
#1D588B on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #1D588B
7.44:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##1D588B | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##1D588B | 1.00 | 7.44 | 2.82 | 7.44 |
| #FFFFFF | 7.44 | 1.00 | 21.00 | 1.00 |
| #000000 | 2.82 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 7.44 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#405B8D
Deuteranopia (green-blind)
#30518A
Tritanopia (blue-blind)
#00646B
Achromatopsia (no color)
#555555
Design tokens & code
CSS
--color: #1d588b; /* rgb */ color: rgb(29, 88, 139); /* oklch */ color: oklch(44.9% 0.103 248.6);
Tailwind
colors: {
custom: {
50: '#6a86ad',
500: '#1d588b',
950: '#000000',
},
}SCSS
$custom: #1d588b; $custom-light: #6a86ad; $custom-dark: #000000;
JSON
{
"hex": "#1d588b",
"rgb": {
"r": 29,
"g": 88,
"b": 139
},
"hsl": {
"h": 207.818,
"s": 65.476,
"l": 32.941
},
"oklch": {
"l": 0.44901,
"c": 0.1029,
"h": 248.6
},
"luminance": 0.09105
}Semantic roles & 50–950 ramp
primary
#1D588B
secondary
#BB7E49
accent
#8E3FE8
background
#F6F8FA
surface
#ECEFF4
border
#C7CACE
text
#070B10
muted
#7A7C7F