#644C55
Closest named color: Brownish Purple (#76424E). oklch(44.5% 0.035 354.2), rgb(100, 76, 85).
Aa
White text reads best on this color (7.75:1).
About this color
#644C55 is a dark, muted red. In OKLCH its lightness is 44%, its chroma 0.035 and its hue 354°. Its hue sits on the warm side of the wheel. The nearest named color is Brownish Purple (#76424E), ΔE 0.040 away. White text reads best on it, at 7.75:1.
| Hue family | Reds |
| Lightness | dark (44%) |
| Chroma | muted (0.035) |
| Temperature | warm |
| Nearest name | Brownish Purple (#76424E) |
| Black text | 2.70:1 |
| White text | 7.75:1 |
Values
| HEX | #644C55 |
| RGB | rgb(100, 76, 85) |
| HSL | hsl(338, 14%, 35%) |
| OKLCH | oklch(44.5% 0.035 354.2) |
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 #644C55 | 7.75:1 | AAA | Lc -91.7 | Preferred for body text |
| Black text on #644C55 | 2.70:1 | Fails | Lc 17.1 | Dividers and decoration only |
| #644C55 text on white | 7.75:1 | AAA | Lc 86.9 | Fine for body text |
| #644C55 text on black | 2.70:1 | Fails | Lc -15.2 | 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 800.
-
Step 50
50
#F7F5F5
oklch(97.2% 0.002 17.2)
-
Step 100
100
#EDE8EA
oklch(93.5% 0.006 350.8)
-
Step 200
200
#E0D6D9
oklch(88.5% 0.012 357)
-
Step 300
300
#CCBBC1
oklch(80.8% 0.021 354.1)
-
Step 400
400
#B299A2
oklch(70.8% 0.032 354.2)
-
Step 500
500
#9F7F8B
oklch(63% 0.043 353.9)
-
Step 600
600
#896975
oklch(55.6% 0.044 354.2)
-
Step 700
700
#755762
oklch(49.2% 0.043 354.9)
-
Step 800
800 (this color)
#644C55
oklch(44.5% 0.035 354.2)
-
Step 900
900
#4E3C42
oklch(37.8% 0.027 356.6)
-
Step 950
950
#2E2327
oklch(27.1% 0.018 354.6)
#644C55 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) | #4E5055 | 0.038 |
| Deuteranopia (no green cones) | #545454 | 0.035 |
| Tritanopia (no blue cones) | #684B4F | 0.011 |
| Achromatopsia (no color) | #525252 | 0.036 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644C55
#644C55
oklch(44.5% 0.035 354.2)
- #3F5A52
#3F5A52
oklch(44.3% 0.035 174.3)
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 #644C55, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Brownish Purple #76424E ΔE 0.040
- Purple Brown #673A3F ΔE 0.051
- Dusty Grape #545775 ΔE 0.056
- Dark Mauve #874C62 ΔE 0.069
- YInMn Blue #415A77 ΔE 0.074
- Dusk #4E5481 ΔE 0.076
- Slate #516572 ΔE 0.076
- Dark Slate Gray #2F4F4F ΔE 0.083
Use #644C55 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.