#1F557A#1F557A
#1F557A is a dark, moderate cyan. Relative luminance 0.082; OKLCH L 43.2% C 0.083 H 242.3°. Best body text is #FFFFFF at 7.96:1 contrast (WCAG AA passes).
Color values
| HEX | #1F557A |
|---|---|
| RGB | rgb(31, 85, 122) |
| HSL | hsl(204, 59%, 30%) |
| HSV | hsv(204, 75%, 48%) |
| CMYK | cmyk(74.6%, 30.3%, 0%, 52.2%) |
| CIE-LAB | lab(34.38, -4.38, -26.07) |
| CIE-LCH | lch(34.38, 26.44, 260.46°) |
| OKLab | oklab(43.2% -0.0386 -0.0737) |
| OKLCH | oklch(43.2% 0.083 242.3) |
| XYZ | xyz(7.3251, 8.1926, 19.6039) |
| Luminance | 0.0819 (WCAG relative) |
| Temperature | cool |
| Family | cyan |
Closest named colors
Deep Sea Blue
#015482
ΔE00 1.93
Light Navy
#155084
ΔE00 3.53
Light Navy Blue
#2E5A88
ΔE00 3.90
Dusk Blue
#26538D
ΔE00 4.96
Dark Slate Blue
#214761
ΔE00 5.43
Prussian Blue
#004577
ΔE00 5.91
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#1F557A #7A441F
analogous
#1F7A72 #1F557A #1F277A
triadic
#1F557A #7A1F55 #557A1F
tetradic
#1F557A #721F7A #7A441F #277A1F
square
#1F557A #721F7A #7A441F #277A1F
split-complementary
#1F557A #7A1F27 #7A721F
monochromatic
#061118 #133349 #1F557A #2B77AB #4497CF
Accessibility & contrast
On white
7.96
#1F557A on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
2.64
#1F557A on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #1F557A
7.96:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##1F557A | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##1F557A | 1.00 | 7.96 | 2.64 | 7.96 |
| #FFFFFF | 7.96 | 1.00 | 21.00 | 1.00 |
| #000000 | 2.64 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 7.96 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#44567C
Deuteranopia (green-blind)
#374D79
Tritanopia (blue-blind)
#005E62
Achromatopsia (no color)
#515151
Design tokens & code
CSS
--color: #1f557a; /* rgb */ color: rgb(31, 85, 122); /* oklch */ color: oklch(43.2% 0.083 242.3);
Tailwind
colors: {
custom: {
50: '#6884a0',
500: '#1f557a',
950: '#000000',
},
}SCSS
$custom: #1f557a; $custom-light: #6884a0; $custom-dark: #000000;
JSON
{
"hex": "#1f557a",
"rgb": {
"r": 31,
"g": 85,
"b": 122
},
"hsl": {
"h": 204.396,
"s": 59.477,
"l": 30
},
"oklch": {
"l": 0.432,
"c": 0.0832,
"h": 242.3
},
"luminance": 0.08193
}Semantic roles & 50–950 ramp
primary
#1F557A
secondary
#AD7147
accent
#8545E3
background
#F6F8F9
surface
#EBEFF2
border
#C6CACC
text
#070A0F
muted
#7A7C7E