#633640
Closest named color: Purple Brown (#673A3F). oklch(39.2% 0.065 6.2), rgb(99, 54, 64).
Aa
White text reads best on this color (9.84:1).
About this color
#633640 is a dark, muted red. In OKLCH its lightness is 39%, its chroma 0.065 and its hue 6°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.015 away. White text reads best on it, at 9.84:1.
| Hue family | Reds |
| Lightness | dark (39%) |
| Chroma | muted (0.065) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.13:1 |
| White text | 9.84:1 |
Values
| HEX | #633640 |
| RGB | rgb(99, 54, 64) |
| HSL | hsl(347, 29%, 30%) |
| OKLCH | oklch(39.2% 0.065 6.2) |
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 #633640 | 9.84:1 | AAA | Lc -96.8 | Preferred for body text |
| Black text on #633640 | 2.13:1 | Fails | Lc 11.3 | Not readable |
| #633640 text on white | 9.84:1 | AAA | Lc 92.6 | Preferred for body text |
| #633640 text on black | 2.13:1 | Fails | Lc -9.8 | 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 900.
-
Step 50
50
#FAF4F5
oklch(97.2% 0.007 5.6)
-
Step 100
100
#F3E6E8
oklch(93.6% 0.014 6.7)
-
Step 200
200
#EAD2D6
oklch(88.5% 0.027 6.2)
-
Step 300
300
#DEB4BB
oklch(80.9% 0.049 7)
-
Step 400
400
#CB8C99
oklch(70.6% 0.078 5.7)
-
Step 500
500
#BD6F80
oklch(63.2% 0.1 6.3)
-
Step 600
600
#A85669
oklch(55.7% 0.109 6.5)
-
Step 700
700
#904658
oklch(49.2% 0.101 6.1)
-
Step 800
800
#753A48
oklch(42.8% 0.084 6.2)
-
Step 900
900 (this color)
#633640
oklch(39.2% 0.065 6.2)
-
Step 950
950
#381E23
oklch(27.2% 0.041 7.7)
#633640 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) | #3D3E40 | 0.072 |
| Deuteranopia (no green cones) | #49473F | 0.067 |
| Tritanopia (no blue cones) | #6A323A | 0.017 |
| Achromatopsia (no color) | #434343 | 0.066 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #633640
#633640
oklch(39.2% 0.065 6.2)
- #09514B
#09514B
oklch(39.3% 0.066 186)
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 #633640, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.015
- Brownish Purple #76424E ΔE 0.054
- Chestnut #742802 ΔE 0.073
- Charcoal Grey #3C4142 ΔE 0.075
- Wine Red #7B0323 ΔE 0.086
- Bordeaux #7B002C ΔE 0.086
- Onyx #343A40 ΔE 0.087
- Reddy Brown #6E1005 ΔE 0.087
Use #633640 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.