#633736
Closest named color: Purple Brown (#673A3F). oklch(39.1% 0.063 21.7), rgb(99, 55, 54).
Aa
White text reads best on this color (9.85:1).
About this color
#633736 is a dark, muted red. In OKLCH its lightness is 39%, its chroma 0.063 and its hue 22°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.017 away. White text reads best on it, at 9.85:1.
| Hue family | Reds |
| Lightness | dark (39%) |
| Chroma | muted (0.063) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.13:1 |
| White text | 9.85:1 |
Values
| HEX | #633736 |
| RGB | rgb(99, 55, 54) |
| HSL | hsl(1, 29%, 30%) |
| OKLCH | oklch(39.1% 0.063 21.7) |
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 #633736 | 9.85:1 | AAA | Lc -96.8 | Preferred for body text |
| Black text on #633736 | 2.13:1 | Fails | Lc 11.3 | Not readable |
| #633736 text on white | 9.85:1 | AAA | Lc 92.7 | Preferred for body text |
| #633736 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
#FAF4F3
oklch(97.2% 0.007 28.8)
-
Step 100
100
#F3E6E6
oklch(93.5% 0.014 17.4)
-
Step 200
200
#EAD3D1
oklch(88.5% 0.026 23.6)
-
Step 300
300
#DEB5B3
oklch(80.9% 0.048 21.5)
-
Step 400
400
#CC8E8C
oklch(70.7% 0.076 21.2)
-
Step 500
500
#BD716F
oklch(63.1% 0.097 21.8)
-
Step 600
600
#A85857
oklch(55.5% 0.105 21.8)
-
Step 700
700
#904847
oklch(49.1% 0.098 22.1)
-
Step 800
800
#753B3B
oklch(42.6% 0.081 21.1)
-
Step 900
900 (this color)
#633736
oklch(39.1% 0.063 21.7)
-
Step 950
950
#381E1E
oklch(27% 0.041 20.1)
#633736 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) | #403E36 | 0.067 |
| Deuteranopia (no green cones) | #4B4735 | 0.063 |
| Tritanopia (no blue cones) | #6B3137 | 0.021 |
| Achromatopsia (no color) | #434343 | 0.064 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #633736
#633736
oklch(39.1% 0.063 21.7)
- #094F54
#094F54
oklch(39.1% 0.063 202.6)
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 #633736, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.017
- Brownish Purple #76424E ΔE 0.058
- Chestnut #742802 ΔE 0.060
- Charcoal Grey #3C4142 ΔE 0.073
- Mud Brown #60460F ΔE 0.074
- Reddy Brown #6E1005 ΔE 0.080
- Red Brown #8B2E16 ΔE 0.085
- Wine Red #7B0323 ΔE 0.086
Use #633736 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.