#1F588A#1F588A
#1F588A is a dark, moderate cyan. Relative luminance 0.091; OKLCH L 44.9% C 0.101 H 248.7°. Best body text is #FFFFFF at 7.44:1 contrast (WCAG AA passes).
Color values
| HEX | #1F588A |
|---|---|
| RGB | rgb(31, 88, 138) |
| HSL | hsl(208, 63%, 33%) |
| HSV | hsv(208, 78%, 54%) |
| CMYK | cmyk(77.5%, 36.2%, 0%, 45.9%) |
| CIE-LAB | lab(36.19, -0.11, -33.05) |
| CIE-LCH | lch(36.19, 33.05, 269.80°) |
| OKLab | oklab(44.9% -0.0366 -0.094) |
| OKLCH | oklch(44.9% 0.101 248.7) |
| XYZ | xyz(8.6405, 9.1047, 25.3418) |
| Luminance | 0.0911 (WCAG relative) |
| Temperature | cool |
| Family | cyan |
Closest named colors
Light Navy Blue
#2E5A88
ΔE00 1.72
Light Navy
#155084
ΔE00 2.70
Deep Sea Blue
#015482
ΔE00 2.87
Dusk Blue
#26538D
ΔE00 3.00
Denim (survey)
#3B638C
ΔE00 4.45
Denim Blue
#3B5B92
ΔE00 4.78
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#1F588A #8A511F
analogous
#1F8A86 #1F588A #1F238A
triadic
#1F588A #8A1F58 #588A1F
tetradic
#1F588A #861F8A #8A511F #238A1F
square
#1F588A #861F8A #8A511F #238A1F
split-complementary
#1F588A #8A1F23 #8A861F
monochromatic
#091826 #143858 #1F588A #2A78BC #4C96D7
Accessibility & contrast
On white
7.44
#1F588A on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
2.82
#1F588A on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #1F588A
7.44:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##1F588A | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##1F588A | 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)
#415B8C
Deuteranopia (green-blind)
#315189
Tritanopia (blue-blind)
#00646A
Achromatopsia (no color)
#555555
Design tokens & code
CSS
--color: #1f588a; /* rgb */ color: rgb(31, 88, 138); /* oklch */ color: oklch(44.9% 0.101 248.7);
Tailwind
colors: {
custom: {
50: '#6b86ac',
500: '#1f588a',
950: '#000000',
},
}SCSS
$custom: #1f588a; $custom-light: #6b86ac; $custom-dark: #000000;
JSON
{
"hex": "#1f588a",
"rgb": {
"r": 31,
"g": 88,
"b": 138
},
"hsl": {
"h": 208.037,
"s": 63.314,
"l": 33.137
},
"oklch": {
"l": 0.44901,
"c": 0.10089,
"h": 248.7
},
"luminance": 0.09106
}Semantic roles & 50–950 ramp
primary
#1F588A
secondary
#BA7F4B
accent
#8F41E6
background
#F6F8FA
surface
#ECEFF4
border
#C7CACE
text
#070B10
muted
#7A7C7F