#1D577B#1D577B
#1D577B is a dark, moderate cyan. Relative luminance 0.085; OKLCH L 43.7% C 0.084 H 240.2°. Best body text is #FFFFFF at 7.77:1 contrast (WCAG AA passes).
Color values
| HEX | #1D577B |
|---|---|
| RGB | rgb(29, 87, 123) |
| HSL | hsl(203, 62%, 30%) |
| HSV | hsv(203, 76%, 48%) |
| CMYK | cmyk(76.4%, 29.3%, 0%, 51.8%) |
| CIE-LAB | lab(35.02, -5.55, -25.70) |
| CIE-LCH | lch(35.02, 26.29, 257.81°) |
| OKLab | oklab(43.7% -0.0416 -0.0726) |
| OKLCH | oklch(43.7% 0.084 240.2) |
| XYZ | xyz(7.4886, 8.5068, 19.9824) |
| Luminance | 0.0851 (WCAG relative) |
| Temperature | cool |
| Family | cyan |
Closest named colors
Deep Sea Blue
#015482
ΔE00 2.34
Light Navy Blue
#2E5A88
ΔE00 4.42
Light Navy
#155084
ΔE00 4.49
Ugly Blue
#31668A
ΔE00 5.31
Dusk Blue
#26538D
ΔE00 5.82
Dark Slate Blue
#214761
ΔE00 5.91
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#1D577B #7B411D
analogous
#1D7B70 #1D577B #1D287B
triadic
#1D577B #7B1D57 #577B1D
tetradic
#1D577B #701D7B #7B411D #287B1D
square
#1D577B #701D7B #7B411D #287B1D
split-complementary
#1D577B #7B1D28 #7B701D
monochromatic
#061219 #113449 #1D577B #297AAD #409AD2
Accessibility & contrast
On white
7.77
#1D577B on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
2.70
#1D577B on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #1D577B
7.77:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##1D577B | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##1D577B | 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)
#46577D
Deuteranopia (green-blind)
#394E7A
Tritanopia (blue-blind)
#006064
Achromatopsia (no color)
#525252
Design tokens & code
CSS
--color: #1d577b; /* rgb */ color: rgb(29, 87, 123); /* oklch */ color: oklch(43.7% 0.084 240.2);
Tailwind
colors: {
custom: {
50: '#6786a1',
500: '#1d577b',
950: '#000000',
},
}SCSS
$custom: #1d577b; $custom-light: #6786a1; $custom-dark: #000000;
JSON
{
"hex": "#1d577b",
"rgb": {
"r": 29,
"g": 87,
"b": 123
},
"hsl": {
"h": 202.979,
"s": 61.842,
"l": 29.804
},
"oklch": {
"l": 0.43703,
"c": 0.08367,
"h": 240.2
},
"luminance": 0.08508
}Semantic roles & 50–950 ramp
primary
#1D577B
secondary
#AF6E45
accent
#8143E5
background
#F6F8F9
surface
#EBEFF2
border
#C6CACC
text
#070B0F
muted
#7A7C7E