#1F557C#1F557C
#1F557C is a dark, moderate cyan. Relative luminance 0.082; OKLCH L 43.3% C 0.086 H 243.7°. Best body text is #FFFFFF at 7.93:1 contrast (WCAG AA passes).
Color values
| HEX | #1F557C |
|---|---|
| RGB | rgb(31, 85, 124) |
| HSL | hsl(205, 60%, 30%) |
| HSV | hsv(205, 75%, 49%) |
| CMYK | cmyk(75%, 31.5%, 0%, 51.4%) |
| CIE-LAB | lab(34.48, -3.62, -27.15) |
| CIE-LCH | lch(34.48, 27.39, 262.41°) |
| OKLab | oklab(43.32% -0.0379 -0.0768) |
| OKLCH | oklch(43.32% 0.086 243.7) |
| XYZ | xyz(7.4503, 8.2427, 20.2632) |
| Luminance | 0.0824 (WCAG relative) |
| Temperature | cool |
| Family | cyan |
Closest named colors
Deep Sea Blue
#015482
ΔE00 1.73
Light Navy
#155084
ΔE00 3.02
Light Navy Blue
#2E5A88
ΔE00 3.43
Dusk Blue
#26538D
ΔE00 4.44
Prussian Blue
#004577
ΔE00 5.66
Dark Slate Blue
#214761
ΔE00 5.70
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#1F557C #7C461F
analogous
#1F7C74 #1F557C #1F277C
triadic
#1F557C #7C1F55 #557C1F
tetradic
#1F557C #741F7C #7C461F #277C1F
square
#1F557C #741F7C #7C461F #277C1F
split-complementary
#1F557C #7C1F27 #7C741F
monochromatic
#07121A #13334B #1F557C #2B77AD #4596D0
Accessibility & contrast
On white
7.93
#1F557C on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
2.65
#1F557C on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #1F557C
7.93:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##1F557C | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##1F557C | 1.00 | 7.93 | 2.65 | 7.93 |
| #FFFFFF | 7.93 | 1.00 | 21.00 | 1.00 |
| #000000 | 2.65 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 7.93 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#43567E
Deuteranopia (green-blind)
#364D7B
Tritanopia (blue-blind)
#005F63
Achromatopsia (no color)
#515151
Design tokens & code
CSS
--color: #1f557c; /* rgb */ color: rgb(31, 85, 124); /* oklch */ color: oklch(43.3% 0.086 243.7);
Tailwind
colors: {
custom: {
50: '#6884a2',
500: '#1f557c',
950: '#000000',
},
}SCSS
$custom: #1f557c; $custom-light: #6884a2; $custom-dark: #000000;
JSON
{
"hex": "#1f557c",
"rgb": {
"r": 31,
"g": 85,
"b": 124
},
"hsl": {
"h": 205.161,
"s": 60,
"l": 30.392
},
"oklch": {
"l": 0.43315,
"c": 0.08568,
"h": 243.7
},
"luminance": 0.08244
}Semantic roles & 50–950 ramp
primary
#1F557C
secondary
#AF7348
accent
#8745E3
background
#F6F8FA
surface
#EBEFF3
border
#C6CACD
text
#070A0F
muted
#7A7C7F