#633720
Closest named color: Chestnut (#742802). oklch(38.7% 0.072 47.3), rgb(99, 55, 32).
Aa
White text reads best on this color (10.01:1).
About this color
#633720 is a dark, moderately saturated brown. In OKLCH its lightness is 39%, its chroma 0.072 and its hue 47°. Its hue sits on the warm side of the wheel. The nearest named color is Chestnut (#742802), ΔE 0.044 away. White text reads best on it, at 10.01:1.
| Hue family | Browns |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.072) |
| Temperature | warm |
| Nearest name | Chestnut (#742802) |
| Black text | 2.09:1 |
| White text | 10.01:1 |
Values
| HEX | #633720 |
| RGB | rgb(99, 55, 32) |
| HSL | hsl(21, 51%, 26%) |
| OKLCH | oklch(38.7% 0.072 47.3) |
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 #633720 | 10.01:1 | AAA | Lc -97.1 | Preferred for body text |
| Black text on #633720 | 2.09:1 | Fails | Lc 11.0 | Not readable |
| #633720 text on white | 10.01:1 | AAA | Lc 93.0 | Preferred for body text |
| #633720 text on black | 2.09:1 | Fails | Lc -9.5 | 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
#FAF4F1
oklch(97.1% 0.008 48.7)
-
Step 100
100
#F3E7E1
oklch(93.6% 0.015 48.6)
-
Step 200
200
#EBD4C9
oklch(88.6% 0.03 47.3)
-
Step 300
300
#DFB7A3
oklch(81% 0.054 48)
-
Step 400
400
#CE9071
oklch(70.7% 0.087 47.4)
-
Step 500
500
#BF734C
oklch(63% 0.11 47.2)
-
Step 600
600
#AB5A2E
oklch(55.6% 0.121 47.1)
-
Step 700
700
#924A21
oklch(49.1% 0.111 47.6)
-
Step 800
800
#773D1D
oklch(42.7% 0.092 47.4)
-
Step 900
900 (this color)
#633720
oklch(38.7% 0.072 47.3)
-
Step 950
950
#391F12
oklch(27.1% 0.046 46.7)
#633720 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) | #433C1E | 0.063 |
| Deuteranopia (no green cones) | #4E4620 | 0.057 |
| Tritanopia (no blue cones) | #6C2F32 | 0.042 |
| Achromatopsia (no color) | #424242 | 0.072 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #633720
#633720
oklch(38.7% 0.072 47.3)
- #064B62
#064B62
oklch(38.6% 0.072 227.6)
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 #633720, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chestnut #742802 ΔE 0.044
- Purple Brown #673A3F ΔE 0.045
- Mud Brown #60460F ΔE 0.051
- Reddy Brown #6E1005 ΔE 0.074
- Brownish Purple #76424E ΔE 0.078
- Charcoal Grey #3C4142 ΔE 0.080
- Red Brown #8B2E16 ΔE 0.080
- Rust Brown #8B3103 ΔE 0.080
Use #633720 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.