#1F577A#1F577A
#1F577A is a dark, moderate cyan. Relative luminance 0.085; OKLCH L 43.7% C 0.082 H 240.0°. Best body text is #FFFFFF at 7.77:1 contrast (WCAG AA passes).
Color values
| HEX | #1F577A |
|---|---|
| RGB | rgb(31, 87, 122) |
| HSL | hsl(203, 59%, 30%) |
| HSV | hsv(203, 75%, 48%) |
| CMYK | cmyk(74.6%, 28.7%, 0%, 52.2%) |
| CIE-LAB | lab(35.03, -5.63, -25.06) |
| CIE-LCH | lch(35.03, 25.68, 257.34°) |
| OKLab | oklab(43.71% -0.0408 -0.0707) |
| OKLCH | oklch(43.71% 0.082 240) |
| XYZ | xyz(7.4848, 8.5120, 19.6571) |
| Luminance | 0.0851 (WCAG relative) |
| Temperature | cool |
| Family | cyan |
Closest named colors
Deep Sea Blue
#015482
ΔE00 2.56
Light Navy Blue
#2E5A88
ΔE00 4.48
Light Navy
#155084
ΔE00 4.61
Ugly Blue
#31668A
ΔE00 5.29
Dark Slate Blue
#214761
ΔE00 5.81
Dusk Blue
#26538D
ΔE00 5.88
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#1F577A #7A421F
analogous
#1F7A70 #1F577A #1F297A
triadic
#1F577A #7A1F57 #577A1F
tetradic
#1F577A #701F7A #7A421F #297A1F
square
#1F577A #701F7A #7A421F #297A1F
split-complementary
#1F577A #7A1F29 #7A701F
monochromatic
#061118 #133449 #1F577A #2B7AAB #449ACF
Accessibility & contrast
On white
7.77
#1F577A on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
2.70
#1F577A on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #1F577A
7.77:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##1F577A | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##1F577A | 1.00 | 7.77 | 2.70 | 7.77 |
| #FFFFFF | 7.77 | 1.00 | 21.00 | 1.00 |
| #000000 | 2.70 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 7.77 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#47577C
Deuteranopia (green-blind)
#3A4E79
Tritanopia (blue-blind)
#006063
Achromatopsia (no color)
#525252
Design tokens & code
CSS
--color: #1f577a; /* rgb */ color: rgb(31, 87, 122); /* oklch */ color: oklch(43.7% 0.082 240.0);
Tailwind
colors: {
custom: {
50: '#6886a0',
500: '#1f577a',
950: '#000000',
},
}SCSS
$custom: #1f577a; $custom-light: #6886a0; $custom-dark: #000000;
JSON
{
"hex": "#1f577a",
"rgb": {
"r": 31,
"g": 87,
"b": 122
},
"hsl": {
"h": 203.077,
"s": 59.477,
"l": 30
},
"oklch": {
"l": 0.43712,
"c": 0.08163,
"h": 240
},
"luminance": 0.08513
}Semantic roles & 50–950 ramp
primary
#1F577A
secondary
#AD6F47
accent
#8245E3
background
#F6F8F9
surface
#EBEFF2
border
#C6CACC
text
#070B0E
muted
#7A7C7E