#634440
Closest named color: Purple Brown (#673A3F). oklch(42% 0.044 27.3), rgb(99, 68, 64).
Aa
White text reads best on this color (8.63:1).
About this color
#634440 is a dark, muted red. In OKLCH its lightness is 42%, its chroma 0.044 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 8.63:1.
| Hue family | Reds |
| Lightness | dark (42%) |
| Chroma | muted (0.044) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.43:1 |
| White text | 8.63:1 |
Values
| HEX | #634440 |
| RGB | rgb(99, 68, 64) |
| HSL | hsl(7, 21%, 32%) |
| OKLCH | oklch(42% 0.044 27.3) |
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 #634440 | 8.63:1 | AAA | Lc -94.1 | Preferred for body text |
| Black text on #634440 | 2.43:1 | Fails | Lc 14.4 | Not readable |
| #634440 text on white | 8.63:1 | AAA | Lc 89.6 | Fine for body text |
| #634440 text on black | 2.43:1 | Fails | Lc -12.7 | 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
#EFE8E7
oklch(93.6% 0.008 27.2)
-
Step 200
200
#E2D6D4
oklch(88.5% 0.014 28.9)
-
Step 300
300
#D1BBB8
oklch(81% 0.026 27)
-
Step 400
400
#B99793
oklch(70.6% 0.041 26)
-
Step 500
500
#A77E78
oklch(63.1% 0.052 28.1)
-
Step 600
600
#926761
oklch(55.7% 0.057 27.9)
-
Step 700
700
#7C5550
oklch(49% 0.053 27.3)
-
Step 800
800 (this color)
#634440
oklch(42% 0.044 27.3)
-
Step 900
900
#523B38
oklch(37.7% 0.033 27.2)
-
Step 950
950
#302321
oklch(27.1% 0.02 28.5)
#634440 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) | #4A4840 | 0.045 |
| Deuteranopia (no green cones) | #524E40 | 0.041 |
| Tritanopia (no blue cones) | #6A4043 | 0.019 |
| Achromatopsia (no color) | #4C4C4C | 0.044 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #634440
#634440
oklch(42% 0.044 27.3)
- #2E5459
#2E5459
oklch(42% 0.044 206.5)
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 #634440, 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 0.044
- Mud Brown #60460F ΔE 0.063
- Charcoal Grey #3C4142 ΔE 0.071
- Milk Chocolate #7F4E1E ΔE 0.078
- Chestnut #742802 ΔE 0.081
- Dark Slate Gray #2F4F4F ΔE 0.083
- Dusty Grape #545775 ΔE 0.088
Use #634440 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.