#644C45
Closest named color: Brownish Purple (#76424E). oklch(44% 0.035 36.9), rgb(100, 76, 69).
Aa
White text reads best on this color (7.89:1).
About this color
#644C45 is a dark, muted red. In OKLCH its lightness is 44%, its chroma 0.035 and its hue 37°. Its hue sits on the warm side of the wheel. The nearest named color is Brownish Purple (#76424E), ΔE 0.047 away. White text reads best on it, at 7.89:1.
| Hue family | Reds |
| Lightness | dark (44%) |
| Chroma | muted (0.035) |
| Temperature | warm |
| Nearest name | Brownish Purple (#76424E) |
| Black text | 2.66:1 |
| White text | 7.89:1 |
Values
| HEX | #644C45 |
| RGB | rgb(100, 76, 69) |
| HSL | hsl(14, 18%, 33%) |
| OKLCH | oklch(44% 0.035 36.9) |
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 #644C45 | 7.89:1 | AAA | Lc -92.1 | Preferred for body text |
| Black text on #644C45 | 2.66:1 | Fails | Lc 16.7 | Dividers and decoration only |
| #644C45 text on white | 7.89:1 | AAA | Lc 87.3 | Fine for body text |
| #644C45 text on black | 2.66:1 | Fails | Lc -14.8 | 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
#F7F5F4
oklch(97.1% 0.003 48.7)
-
Step 100
100
#EEE8E7
oklch(93.5% 0.007 28.8)
-
Step 200
200
#E0D7D4
oklch(88.5% 0.011 39.4)
-
Step 300
300
#CDBCB8
oklch(80.8% 0.02 33.4)
-
Step 400
400
#B49A93
oklch(70.7% 0.033 35.5)
-
Step 500
500
#A18178
oklch(63.1% 0.042 36.2)
-
Step 600
600
#8B6A61
oklch(55.5% 0.045 35.8)
-
Step 700
700
#765950
oklch(49.1% 0.041 37.9)
-
Step 800
800 (this color)
#644C45
oklch(44% 0.035 36.9)
-
Step 900
900
#4F3D37
oklch(37.8% 0.027 39.2)
-
Step 950
950
#2E2421
oklch(27.1% 0.016 37.3)
#644C45 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) | #514F44 | 0.034 |
| Deuteranopia (no green cones) | #575345 | 0.029 |
| Tritanopia (no blue cones) | #6A494A | 0.017 |
| Achromatopsia (no color) | #515151 | 0.035 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644C45
#644C45
oklch(44% 0.035 36.9)
- #3C575F
#3C575F
oklch(43.8% 0.035 218.2)
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 #644C45, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Brownish Purple #76424E ΔE 0.047
- Purple Brown #673A3F ΔE 0.049
- Mud Brown #60460F ΔE 0.064
- Milk Chocolate #7F4E1E ΔE 0.068
- Dusty Grape #545775 ΔE 0.076
- Medium Brown #7F5112 ΔE 0.078
- Olive Brown #645403 ΔE 0.080
- Dark Slate Gray #2F4F4F ΔE 0.080
Use #644C45 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.