#633F09
Closest named color: Mud Brown (#60460F). oklch(40% 0.081 70.6), rgb(99, 63, 9).
Aa
White text reads best on this color (9.35:1).
About this color
#633F09 is a dark, moderately saturated brown. In OKLCH its lightness is 40%, its chroma 0.081 and its hue 71°. Its hue sits on the warm side of the wheel. The nearest named color is Mud Brown (#60460F), ΔE 0.019 away. White text reads best on it, at 9.35:1.
| Hue family | Browns |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.081) |
| Temperature | warm |
| Nearest name | Mud Brown (#60460F) |
| Black text | 2.24:1 |
| White text | 9.35:1 |
Values
| HEX | #633F09 |
| RGB | rgb(99, 63, 9) |
| HSL | hsl(36, 83%, 21%) |
| OKLCH | oklch(40% 0.081 70.6) |
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 #633F09 | 9.35:1 | AAA | Lc -95.7 | Preferred for body text |
| Black text on #633F09 | 2.24:1 | Fails | Lc 12.6 | Not readable |
| #633F09 text on white | 9.35:1 | AAA | Lc 91.4 | Preferred for body text |
| #633F09 text on black | 2.24:1 | Fails | Lc -11.0 | 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
#F9F5F0
oklch(97.2% 0.008 73.7)
-
Step 100
100
#F2E8DD
oklch(93.6% 0.018 70.2)
-
Step 200
200
#E8D6C2
oklch(88.5% 0.033 70.3)
-
Step 300
300
#DABB96
oklch(81% 0.061 71.7)
-
Step 400
400
#C7965A
oklch(70.7% 0.097 70.8)
-
Step 500
500
#B87B21
oklch(63.2% 0.124 71.2)
-
Step 600
600
#9F6500
oklch(55.7% 0.12 70.6)
-
Step 700
700
#865400
oklch(49.1% 0.106 70.2)
-
Step 800
800
#6E4500
oklch(42.8% 0.092 71.2)
-
Step 900
900 (this color)
#633F09
oklch(40% 0.081 70.6)
-
Step 950
950
#362106
oklch(26.9% 0.051 69.2)
#633F09 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) | #4B4100 | 0.048 |
| Deuteranopia (no green cones) | #544A0B | 0.041 |
| Tritanopia (no blue cones) | #6D3635 | 0.066 |
| Achromatopsia (no color) | #474747 | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #633F09
#633F09
oklch(40% 0.081 70.6)
- #224A72
#224A72
oklch(40.1% 0.082 250.6)
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 #633F09, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mud Brown #60460F ΔE 0.019
- Green Brown #544E03 ΔE 0.052
- Chestnut #742802 ΔE 0.061
- Olive Brown #645403 ΔE 0.062
- Purple Brown #673A3F ΔE 0.072
- Milk Chocolate #7F4E1E ΔE 0.072
- Medium Brown #7F5112 ΔE 0.077
- Rust Brown #8B3103 ΔE 0.083
Use #633F09 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.