#664151
Closest named color: Purple Brown (#673A3F). oklch(42.3% 0.056 352.2), rgb(102, 65, 81).
Aa
White text reads best on this color (8.60:1).
About this color
#664151 is a dark, muted red. In OKLCH its lightness is 42%, its chroma 0.056 and its hue 352°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.029 away. White text reads best on it, at 8.60:1.
| Hue family | Reds |
| Lightness | dark (42%) |
| Chroma | muted (0.056) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.43:1 |
| White text | 8.60:1 |
Values
| HEX | #664151 |
| RGB | rgb(102, 65, 81) |
| HSL | hsl(334, 22%, 33%) |
| OKLCH | oklch(42.3% 0.056 352.2) |
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 #664151 | 8.60:1 | AAA | Lc -94.0 | Preferred for body text |
| Black text on #664151 | 2.43:1 | Fails | Lc 14.5 | Not readable |
| #664151 text on white | 8.60:1 | AAA | Lc 89.5 | Fine for body text |
| #664151 text on black | 2.43:1 | Fails | Lc -12.8 | Not readable |
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 800.
-
Step 50
50
#F8F4F6
oklch(97.1% 0.005 345.3)
-
Step 100
100
#EFE7EA
oklch(93.5% 0.01 352.4)
-
Step 200
200
#E3D4DA
oklch(88.4% 0.018 351.2)
-
Step 300
300
#D3B8C3
oklch(80.9% 0.034 351.4)
-
Step 400
400
#BB94A4
oklch(70.7% 0.051 352)
-
Step 500
500
#AA798D
oklch(63.1% 0.067 353)
-
Step 600
600
#956178
oklch(55.6% 0.074 351.7)
-
Step 700
700
#7F5065
oklch(49.1% 0.069 351.6)
-
Step 800
800 (this color)
#664151
oklch(42.3% 0.056 352.2)
-
Step 900
900
#543844
oklch(37.7% 0.044 352)
-
Step 950
950
#312128
oklch(27% 0.027 351.1)
#664151 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) | #454852 | 0.059 |
| Deuteranopia (no green cones) | #4E4E50 | 0.055 |
| Tritanopia (no blue cones) | #6B4047 | 0.018 |
| Achromatopsia (no color) | #4C4C4C | 0.057 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #664151
#664151
oklch(42.3% 0.056 352.2)
- #2A584B
#2A584B
oklch(42.3% 0.056 172.9)
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 #664151, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.029
- Brownish Purple #76424E ΔE 0.032
- Dark Mauve #874C62 ΔE 0.075
- Dusty Grape #545775 ΔE 0.076
- Charcoal Grey #3C4142 ΔE 0.081
- Dusk #4E5481 ΔE 0.088
- YInMn Blue #415A77 ΔE 0.093
- Dark Slate Gray #2F4F4F ΔE 0.094
Use #664151 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.