#633339
Closest named color: Purple Brown (#673A3F). oklch(38.5% 0.069 12.9), rgb(99, 51, 57).
Aa
White text reads best on this color (10.17:1).
About this color
#633339 is a dark, muted red. In OKLCH its lightness is 38%, its chroma 0.069 and its hue 13°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.021 away. White text reads best on it, at 10.17:1.
| Hue family | Reds |
| Lightness | dark (38%) |
| Chroma | muted (0.069) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.06:1 |
| White text | 10.17:1 |
Values
| HEX | #633339 |
| RGB | rgb(99, 51, 57) |
| HSL | hsl(353, 32%, 29%) |
| OKLCH | oklch(38.5% 0.069 12.9) |
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 #633339 | 10.17:1 | AAA | Lc -97.5 | Preferred for body text |
| Black text on #633339 | 2.06:1 | Fails | Lc 10.6 | Not readable |
| #633339 text on white | 10.17:1 | AAA | Lc 93.4 | Preferred for body text |
| #633339 text on black | 2.06:1 | Fails | Lc -9.1 | 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
#FAF4F4
oklch(97.2% 0.006 17.3)
-
Step 100
100
#F4E6E7
oklch(93.6% 0.015 12.4)
-
Step 200
200
#ECD2D4
oklch(88.6% 0.029 12.4)
-
Step 300
300
#E0B4B7
oklch(81% 0.051 13.7)
-
Step 400
400
#CF8B92
oklch(70.7% 0.084 12.7)
-
Step 500
500
#C16D77
oklch(63.1% 0.107 13)
-
Step 600
600
#AC5460
oklch(55.7% 0.115 13)
-
Step 700
700
#93444F
oklch(49.1% 0.107 13.2)
-
Step 800
800
#783841
oklch(42.7% 0.09 12.8)
-
Step 900
900 (this color)
#633339
oklch(38.5% 0.069 12.9)
-
Step 950
950
#391D20
oklch(27% 0.044 13.6)
#633339 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) | #3C3B39 | 0.075 |
| Deuteranopia (no green cones) | #484538 | 0.070 |
| Tritanopia (no blue cones) | #6B2E35 | 0.019 |
| Achromatopsia (no color) | #414141 | 0.070 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #633339
#633339
oklch(38.5% 0.069 12.9)
- #004E4D
#004E4D
oklch(38.3% 0.066 193.3)
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 #633339, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.021
- Brownish Purple #76424E ΔE 0.062
- Chestnut #742802 ΔE 0.064
- Reddy Brown #6E1005 ΔE 0.076
- Charcoal Grey #3C4142 ΔE 0.077
- Wine Red #7B0323 ΔE 0.079
- Bordeaux #7B002C ΔE 0.081
- Merlot #730039 ΔE 0.083
Use #633339 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.