#64748B color
#64748B is a medium, muted blue, closest to the CSS named color slategray (#708090).
Color values
| HEX | #64748B |
| RGB | rgb(100, 116, 139) |
| HSL | hsl(215, 16%, 47%) |
| CMYK | cmyk(28%, 17%, 0%, 45%) |
| Decimal | 6583435 |
| CSS | color: #64748B; |
| Android | 0xFF64748B |
| Swift | UIColor(red: 0.392, green: 0.455, blue: 0.545, alpha: 1) |
Accessibility and contrast
| White text on #64748B | 4.76:1 — AA pass · AA large pass · AAA fail |
| Black text on #64748B | 4.41:1 — AA fail · AA large pass · AAA fail |
| Recommended text color | white |
WCAG 2.1 asks for at least 4.5:1 for body text and 3:1 for large text (18 pt, or 14 pt bold).
Tints and shades of #64748B
Each swatch keeps the hue and saturation of #64748B and varies only lightness — the quickest way to build a usable scale from a single brand color.
Colors that go with #64748B
Harmonies generated by rotating the hue on the color wheel while holding saturation and lightness constant.
Using #64748B in code
/* CSS */
.element { color: #64748B; background-color: #64748B; }
.element { color: rgb(100 116 139); }
.element { color: hsl(215 16% 47%); }
/* Tailwind arbitrary value */
<div class="bg-[#64748B] text-white">
/* SCSS variable */
$brand: #64748B;Frequently asked questions
What color is #64748B?
#64748B is a medium, muted blue. Its hue sits at 215° on the color wheel, with 16% saturation and 47% lightness.
What is #64748B in RGB?
#64748B converts to rgb(100, 116, 139) — 100 red, 116 green and 139 blue.
What is #64748B in CMYK?
Approximately cmyk(28%, 17%, 0%, 45%). Print output depends on the ICC profile of the press and paper, so treat this as a starting point rather than an exact match.
Should text on #64748B be white or black?
White gives the better contrast ratio (4.76:1 versus 4.41:1).
What is the complementary color of #64748B?
#8B7B65 — the hue directly opposite #64748B on the color wheel.