#644646
Closest named color: Purple Brown (#673A3F). oklch(42.7% 0.041 18.9), rgb(100, 70, 70).
Aa
White text reads best on this color (8.37:1).
About this color
#644646 is a dark, muted red. In OKLCH its lightness is 43%, its chroma 0.041 and its hue 19°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.032 away. White text reads best on it, at 8.37:1.
| Hue family | Reds |
| Lightness | dark (43%) |
| Chroma | muted (0.041) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.50:1 |
| White text | 8.37:1 |
Values
| HEX | #644646 |
| RGB | rgb(100, 70, 70) |
| HSL | hsl(0, 18%, 33%) |
| OKLCH | oklch(42.7% 0.041 18.9) |
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 #644646 | 8.37:1 | AAA | Lc -93.4 | Preferred for body text |
| Black text on #644646 | 2.50:1 | Fails | Lc 15.2 | Dividers and decoration only |
| #644646 text on white | 8.37:1 | AAA | Lc 88.8 | Fine for body text |
| #644646 text on black | 2.50:1 | Fails | Lc -13.4 | 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
#F8F5F4
oklch(97.2% 0.003 39.5)
-
Step 100
100
#EEE8E8
oklch(93.6% 0.007 17.3)
-
Step 200
200
#E2D6D5
oklch(88.5% 0.013 23.2)
-
Step 300
300
#D0BBBA
oklch(80.9% 0.024 20.9)
-
Step 400
400
#B89797
oklch(70.6% 0.04 18.1)
-
Step 500
500
#A67E7E
oklch(63.2% 0.05 18.6)
-
Step 600
600
#906767
oklch(55.6% 0.053 18.9)
-
Step 700
700
#7B5555
oklch(49% 0.051 19.1)
-
Step 800
800 (this color)
#644646
oklch(42.7% 0.041 18.9)
-
Step 900
900
#523B3B
oklch(37.8% 0.033 18.7)
-
Step 950
950
#302322
oklch(27.1% 0.02 23.5)
#644646 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) | #4C4A46 | 0.043 |
| Deuteranopia (no green cones) | #535046 | 0.040 |
| Tritanopia (no blue cones) | #6A4346 | 0.013 |
| Achromatopsia (no color) | #4E4E4E | 0.042 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644646
#644646
oklch(42.7% 0.041 18.9)
- #325658
#325658
oklch(42.7% 0.042 200.3)
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 #644646, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.032
- Brownish Purple #76424E ΔE 0.039
- Mud Brown #60460F ΔE 0.070
- Charcoal Grey #3C4142 ΔE 0.074
- Dusty Grape #545775 ΔE 0.079
- Milk Chocolate #7F4E1E ΔE 0.079
- Dark Mauve #874C62 ΔE 0.082
- Dark Slate Gray #2F4F4F ΔE 0.083
Use #644646 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.