#644440
Closest named color: Purple Brown (#673A3F). oklch(42.1% 0.045 27.1), rgb(100, 68, 64).
Aa
White text reads best on this color (8.59:1).
About this color
#644440 is a dark, muted red. In OKLCH its lightness is 42%, its chroma 0.045 and its hue 27°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.028 away. White text reads best on it, at 8.59:1.
| Hue family | Reds |
| Lightness | dark (42%) |
| Chroma | muted (0.045) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.44:1 |
| White text | 8.59:1 |
Values
| HEX | #644440 |
| RGB | rgb(100, 68, 64) |
| HSL | hsl(7, 22%, 32%) |
| OKLCH | oklch(42.1% 0.045 27.1) |
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 #644440 | 8.59:1 | AAA | Lc -94.0 | Preferred for body text |
| Black text on #644440 | 2.44:1 | Fails | Lc 14.5 | Not readable |
| #644440 text on white | 8.59:1 | AAA | Lc 89.5 | Fine for body text |
| #644440 text on black | 2.44:1 | 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
#F8F4F4
oklch(97% 0.004 17.2)
-
Step 100
100
#EFE8E7
oklch(93.6% 0.008 27.2)
-
Step 200
200
#E3D6D4
oklch(88.6% 0.015 28)
-
Step 300
300
#D1BBB7
oklch(81% 0.026 30)
-
Step 400
400
#BA9792
oklch(70.7% 0.043 27.7)
-
Step 500
500
#A87D78
oklch(63% 0.054 26.3)
-
Step 600
600
#936661
oklch(55.6% 0.059 26.2)
-
Step 700
700
#7D5550
oklch(49.1% 0.054 27.1)
-
Step 800
800 (this color)
#644440
oklch(42.1% 0.045 27.1)
-
Step 900
900
#533B37
oklch(37.8% 0.035 29.5)
-
Step 950
950
#312221
oklch(27% 0.023 23.1)
#644440 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) | #4B4840 | 0.045 |
| Deuteranopia (no green cones) | #524E40 | 0.042 |
| Tritanopia (no blue cones) | #6B4043 | 0.018 |
| Achromatopsia (no color) | #4C4C4C | 0.045 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644440
#644440
oklch(42.1% 0.045 27.1)
- #2D555A
#2D555A
oklch(42.2% 0.046 206)
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 #644440, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.028
- Brownish Purple #76424E ΔE 0.043
- Mud Brown #60460F ΔE 0.063
- Charcoal Grey #3C4142 ΔE 0.072
- Milk Chocolate #7F4E1E ΔE 0.077
- Chestnut #742802 ΔE 0.081
- Dark Slate Gray #2F4F4F ΔE 0.085
- Dark Mauve #874C62 ΔE 0.088
Use #644440 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.