#5B648C
Closest named color: Dusky Blue (#475F94). oklch(51.2% 0.065 274.1), rgb(91, 100, 140).
Aa
White text reads best on this color (5.75:1).
About this color
#5B648C is a medium-dark, muted blue. In OKLCH its lightness is 51%, its chroma 0.065 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Dusky Blue (#475F94), ΔE 0.036 away. White text reads best on it, at 5.75:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | muted (0.065) |
| Temperature | cool |
| Nearest name | Dusky Blue (#475F94) |
| Black text | 3.64:1 |
| White text | 5.75:1 |
Values
| HEX | #5B648C |
| RGB | rgb(91, 100, 140) |
| HSL | hsl(229, 21%, 45%) |
| OKLCH | oklch(51.2% 0.065 274.1) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #5B648C | 5.75:1 | AA | Lc -84.0 | Fine for body text |
| Black text on #5B648C | 3.64:1 | AA large text | Lc 25.3 | Dividers and decoration only |
| #5B648C text on white | 5.75:1 | AA | Lc 78.8 | Fine for body text |
| #5B648C text on black | 3.64:1 | AA large text | Lc -23.0 | Dividers and decoration only |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 700.
-
Step 50
50
#F4F5F8
oklch(97% 0.004 271.4)
-
Step 100
100
#E8E9F0
oklch(93.5% 0.009 279.7)
-
Step 200
200
#D5D9E5
oklch(88.6% 0.017 271.2)
-
Step 300
300
#BAC0D5
oklch(81% 0.03 273)
-
Step 400
400
#979FC0
oklch(70.7% 0.049 274.4)
-
Step 500
500
#7D87B1
oklch(63.1% 0.064 274)
-
Step 600
600
#67709C
oklch(55.5% 0.069 275)
-
Step 700
700 (this color)
#5B648C
oklch(51.2% 0.065 274.1)
-
Step 800
800
#464D6D
oklch(42.8% 0.054 274.4)
-
Step 900
900
#3B4058
oklch(37.7% 0.042 275.1)
-
Step 950
950
#222634
oklch(27.1% 0.027 272.1)
#5B648C with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #57688E | 0.012 |
| Deuteranopia (no green cones) | #54648B | 0.010 |
| Tritanopia (no blue cones) | #4D6C72 | 0.058 |
| Achromatopsia (no color) | #666666 | 0.065 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B648C
#5B648C
oklch(51.2% 0.065 274.1)
- #73663A
#73663A
oklch(51.2% 0.064 93.4)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #5B648C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusky Blue #475F94 ΔE 0.036
- Denim #3B638C ΔE 0.041
- Metallic Blue #4F738E ΔE 0.044
- Slate #516572 ΔE 0.047
- Dusty Grape #545775 ΔE 0.049
- Dull Blue #49759C ΔE 0.051
- Muted Blue #3B719F ΔE 0.051
- Dusk #4E5481 ΔE 0.052
Use #5B648C in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.