#633B2F
Closest named color: Purple Brown (#673A3F). oklch(39.7% 0.06 37.5), rgb(99, 59, 47).
Aa
White text reads best on this color (9.55:1).
About this color
#633B2F is a dark, muted red. In OKLCH its lightness is 40%, its chroma 0.060 and its hue 37°. 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 9.55:1.
| Hue family | Reds |
| Lightness | dark (40%) |
| Chroma | muted (0.060) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.19:1 |
| White text | 9.55:1 |
Values
| HEX | #633B2F |
| RGB | rgb(99, 59, 47) |
| HSL | hsl(14, 36%, 29%) |
| OKLCH | oklch(39.7% 0.06 37.5) |
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 #633B2F | 9.55:1 | AAA | Lc -96.2 | Preferred for body text |
| Black text on #633B2F | 2.19:1 | Fails | Lc 12.0 | Not readable |
| #633B2F text on white | 9.55:1 | AAA | Lc 92.0 | Preferred for body text |
| #633B2F text on black | 2.19:1 | Fails | Lc -10.4 | 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
#F9F4F2
oklch(97% 0.006 43.3)
-
Step 100
100
#F2E7E4
oklch(93.6% 0.013 35.7)
-
Step 200
200
#E9D4CD
oklch(88.5% 0.025 39.4)
-
Step 300
300
#DCB7AC
oklch(80.9% 0.046 37.2)
-
Step 400
400
#C99180
oklch(70.7% 0.073 37.6)
-
Step 500
500
#BA7560
oklch(63.1% 0.093 37.7)
-
Step 600
600
#A55D47
oklch(55.6% 0.1 37.8)
-
Step 700
700
#8D4C38
oklch(49% 0.093 37.9)
-
Step 800
800
#733F2F
oklch(42.8% 0.077 37.9)
-
Step 900
900 (this color)
#633B2F
oklch(39.7% 0.06 37.5)
-
Step 950
950
#372019
oklch(27.1% 0.038 37.7)
#633B2F 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) | #45402E | 0.057 |
| Deuteranopia (no green cones) | #4E482F | 0.052 |
| Tritanopia (no blue cones) | #6B3538 | 0.029 |
| Achromatopsia (no color) | #454545 | 0.061 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #633B2F
#633B2F
oklch(39.7% 0.06 37.5)
- #174F5C
#174F5C
oklch(39.8% 0.06 216.4)
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 #633B2F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.028
- Mud Brown #60460F ΔE 0.056
- Chestnut #742802 ΔE 0.057
- Brownish Purple #76424E ΔE 0.062
- Charcoal Grey #3C4142 ΔE 0.072
- Red Brown #8B2E16 ΔE 0.081
- Rust Brown #8B3103 ΔE 0.083
- Reddy Brown #6E1005 ΔE 0.085
Use #633B2F 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.