#1584B4#1584B4
#1584B4 is a mid, moderate cyan. Relative luminance 0.200; OKLCH L 57.9% C 0.116 H 234.2°. Best body text is #000000 at 4.99:1 contrast (WCAG AA passes).
Color values
| HEX | #1584B4 |
|---|---|
| RGB | rgb(21, 132, 180) |
| HSL | hsl(198, 79%, 39%) |
| HSV | hsv(198, 88%, 71%) |
| CMYK | cmyk(88.3%, 26.7%, 0%, 29.4%) |
| CIE-LAB | lab(51.79, -11.60, -33.35) |
| CIE-LCH | lch(51.79, 35.31, 250.81°) |
| OKLab | oklab(57.9% -0.0679 -0.0943) |
| OKLCH | oklch(57.9% 0.116 234.2) |
| XYZ | xyz(16.7954, 19.9551, 46.1377) |
| Luminance | 0.1996 (WCAG relative) |
| Temperature | cool |
| Family | cyan |
Closest named colors
Cerulean
#007BA7
ΔE00 3.68
Nice Blue
#107AB0
ΔE00 4.19
Water Blue
#0E87CC
ΔE00 4.79
Steel Blue
#4682B4
ΔE00 5.29
Dirty Blue
#3F829D
ΔE00 5.49
Cerulean (survey)
#0485D1
ΔE00 5.78
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#1584B4 #B44515
analogous
#15B495 #1584B4 #1535B4
triadic
#1584B4 #B41584 #84B415
tetradic
#1584B4 #9515B4 #B44515 #35B415
square
#1584B4 #9515B4 #B44515 #35B415
split-complementary
#1584B4 #B41535 #B49515
monochromatic
#083446 #0F5C7D #1584B4 #21AAE5 #58BFEC
Accessibility & contrast
On white
4.21
#1584B4 on #FFFFFF
AA ✗AA large ✓AAA ✗
On black
4.99
#1584B4 on #000000
AA ✓AA large ✓AAA ✗
Best text color
#000000 on #1584B4
4.99:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##1584B4 | #FFFFFF | #000000 | ##000000 |
|---|---|---|---|---|
| ##1584B4 | 1.00 | 4.21 | 4.99 | 4.99 |
| #FFFFFF | 4.21 | 1.00 | 21.00 | 21.00 |
| #000000 | 4.99 | 21.00 | 1.00 | 1.00 |
| ##000000 | 4.99 | 21.00 | 1.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#6C83B6
Deuteranopia (green-blind)
#5875B3
Tritanopia (blue-blind)
#009194
Achromatopsia (no color)
#7B7B7B
Design tokens & code
CSS
--color: #1584b4; /* rgb */ color: rgb(21, 132, 180); /* oklch */ color: oklch(57.9% 0.116 234.2);
Tailwind
colors: {
custom: {
50: '#73a7ca',
500: '#1584b4',
950: '#000000',
},
}SCSS
$custom: #1584b4; $custom-light: #73a7ca; $custom-dark: #000000;
JSON
{
"hex": "#1584b4",
"rgb": {
"r": 21,
"g": 132,
"b": 180
},
"hsl": {
"h": 198.113,
"s": 79.104,
"l": 39.412
},
"oklch": {
"l": 0.57899,
"c": 0.11623,
"h": 234.2
},
"luminance": 0.19957
}Semantic roles & 50–950 ramp
primary
#1584B4
secondary
#CF7B56
accent
#6D32F6
background
#F7FAFC
surface
#EEF4F8
border
#C9CED1
text
#0A0F13
muted
#7C7F82