#634840
Closest named color: Purple Brown (#673A3F). oklch(42.9% 0.04 37.2), rgb(99, 72, 64).
Aa
White text reads best on this color (8.29:1).
About this color
#634840 is a dark, muted red. In OKLCH its lightness is 43%, its chroma 0.040 and its hue 37°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.040 away. White text reads best on it, at 8.29:1.
| Hue family | Reds |
| Lightness | dark (43%) |
| Chroma | muted (0.040) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.53:1 |
| White text | 8.29:1 |
Values
| HEX | #634840 |
| RGB | rgb(99, 72, 64) |
| HSL | hsl(14, 21%, 32%) |
| OKLCH | oklch(42.9% 0.04 37.2) |
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 #634840 | 8.29:1 | AAA | Lc -93.2 | Preferred for body text |
| Black text on #634840 | 2.53:1 | Fails | Lc 15.4 | Dividers and decoration only |
| #634840 text on white | 8.29:1 | AAA | Lc 88.6 | Fine for body text |
| #634840 text on black | 2.53:1 | Fails | Lc -13.6 | 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
#E1D6D3
oklch(88.4% 0.013 35.7)
-
Step 300
300
#CFBCB6
oklch(80.9% 0.023 38.3)
-
Step 400
400
#B69990
oklch(70.7% 0.037 37.9)
-
Step 500
500
#A48075
oklch(63.1% 0.048 37.7)
-
Step 600
600
#8F695E
oklch(55.6% 0.052 36.8)
-
Step 700
700
#79574D
oklch(49% 0.048 37)
-
Step 800
800 (this color)
#634840
oklch(42.9% 0.04 37.2)
-
Step 900
900
#503C36
oklch(37.6% 0.03 37.3)
-
Step 950
950
#2F2320
oklch(26.9% 0.019 34.4)
#634840 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) | #4E4B3F | 0.038 |
| Deuteranopia (no green cones) | #555040 | 0.033 |
| Tritanopia (no blue cones) | #694446 | 0.020 |
| Achromatopsia (no color) | #4E4E4E | 0.040 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #634840
#634840
oklch(42.9% 0.04 37.2)
- #36555E
#36555E
oklch(42.9% 0.039 218)
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 #634840, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.040
- Brownish Purple #76424E ΔE 0.048
- Mud Brown #60460F ΔE 0.058
- Milk Chocolate #7F4E1E ΔE 0.071
- Charcoal Grey #3C4142 ΔE 0.074
- Dark Slate Gray #2F4F4F ΔE 0.080
- Olive Brown #645403 ΔE 0.081
- Medium Brown #7F5112 ΔE 0.081
Use #634840 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.