#634A1F
Closest named color: Mud Brown (#60460F). oklch(42.7% 0.068 78.7), rgb(99, 74, 31).
Aa
White text reads best on this color (8.30:1).
About this color
#634A1F is a dark, muted brown. In OKLCH its lightness is 43%, its chroma 0.068 and its hue 79°. Its hue sits on the warm side of the wheel. The nearest named color is Mud Brown (#60460F), ΔE 0.017 away. White text reads best on it, at 8.30:1.
| Hue family | Browns |
| Lightness | dark (43%) |
| Chroma | muted (0.068) |
| Temperature | warm |
| Nearest name | Mud Brown (#60460F) |
| Black text | 2.52:1 |
| White text | 8.30:1 |
Values
| HEX | #634A1F |
| RGB | rgb(99, 74, 31) |
| HSL | hsl(38, 52%, 25%) |
| OKLCH | oklch(42.7% 0.068 78.7) |
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 #634A1F | 8.30:1 | AAA | Lc -93.2 | Preferred for body text |
| Black text on #634A1F | 2.52:1 | Fails | Lc 15.4 | Dividers and decoration only |
| #634A1F text on white | 8.30:1 | AAA | Lc 88.6 | Fine for body text |
| #634A1F text on black | 2.52:1 | Fails | Lc -13.6 | 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 800.
-
Step 50
50
#F7F5F1
oklch(97.1% 0.006 84.6)
-
Step 100
100
#EEE9E1
oklch(93.6% 0.012 79.8)
-
Step 200
200
#E1D8C9
oklch(88.5% 0.023 80.7)
-
Step 300
300
#CFBEA4
oklch(80.9% 0.04 78.5)
-
Step 400
400
#B69C73
oklch(70.6% 0.064 78.8)
-
Step 500
500
#A4844E
oklch(63.2% 0.082 79.5)
-
Step 600
600
#8F6D31
oklch(55.6% 0.089 79.4)
-
Step 700
700
#7A5B24
oklch(49.2% 0.082 79)
-
Step 800
800 (this color)
#634A1F
oklch(42.7% 0.068 78.7)
-
Step 900
900
#513E1F
oklch(37.7% 0.053 78.3)
-
Step 950
950
#2F2413
oklch(26.8% 0.033 77.5)
#634A1F 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) | #544B1A | 0.029 |
| Deuteranopia (no green cones) | #5A5120 | 0.025 |
| Tritanopia (no blue cones) | #6C4341 | 0.060 |
| Achromatopsia (no color) | #4E4E4E | 0.068 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #634A1F
#634A1F
oklch(42.7% 0.068 78.7)
- #374F74
#374F74
oklch(42.5% 0.069 258.8)
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 #634A1F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mud Brown #60460F ΔE 0.017
- Olive Brown #645403 ΔE 0.040
- Green Brown #544E03 ΔE 0.040
- Milk Chocolate #7F4E1E ΔE 0.055
- Medium Brown #7F5112 ΔE 0.058
- Mud #735C12 ΔE 0.065
- Army Green #4B5D16 ΔE 0.071
- Greeny Brown #696006 ΔE 0.073
Use #634A1F 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.