#644C1B
Closest named color: Mud Brown (#60460F). oklch(43.2% 0.073 82.3), rgb(100, 76, 27).
Aa
White text reads best on this color (8.10:1).
About this color
#644C1B is a dark, moderately saturated brown. In OKLCH its lightness is 43%, its chroma 0.073 and its hue 82°. Its hue sits on the warm side of the wheel. The nearest named color is Mud Brown (#60460F), ΔE 0.020 away. White text reads best on it, at 8.10:1.
| Hue family | Browns |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.073) |
| Temperature | warm |
| Nearest name | Mud Brown (#60460F) |
| Black text | 2.59:1 |
| White text | 8.10:1 |
Values
| HEX | #644C1B |
| RGB | rgb(100, 76, 27) |
| HSL | hsl(40, 57%, 25%) |
| OKLCH | oklch(43.2% 0.073 82.3) |
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 #644C1B | 8.10:1 | AAA | Lc -92.6 | Preferred for body text |
| Black text on #644C1B | 2.59:1 | Fails | Lc 16.1 | Dividers and decoration only |
| #644C1B text on white | 8.10:1 | AAA | Lc 87.9 | Fine for body text |
| #644C1B text on black | 2.59:1 | Fails | Lc -14.2 | 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
#E1D8C8
oklch(88.5% 0.024 82.1)
-
Step 300
300
#CEBFA2
oklch(81% 0.043 83.8)
-
Step 400
400
#B69D6F
oklch(70.7% 0.069 82.3)
-
Step 500
500
#A48449
oklch(63.1% 0.087 81.4)
-
Step 600
600
#8F6D29
oklch(55.6% 0.095 81.7)
-
Step 700
700
#795B1C
oklch(49% 0.087 82.2)
-
Step 800
800 (this color)
#644C1B
oklch(43.2% 0.073 82.3)
-
Step 900
900
#503F1B
oklch(37.8% 0.057 84.1)
-
Step 950
950
#2F2511
oklch(27.1% 0.036 83.5)
#644C1B 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) | #564C15 | 0.027 |
| Deuteranopia (no green cones) | #5C521D | 0.021 |
| Tritanopia (no blue cones) | #6D4542 | 0.064 |
| Achromatopsia (no color) | #505050 | 0.073 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644C1B
#644C1B
oklch(43.2% 0.073 82.3)
- #3A5078
#3A5078
oklch(43.2% 0.072 261.8)
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 #644C1B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mud Brown #60460F ΔE 0.020
- Olive Brown #645403 ΔE 0.032
- Green Brown #544E03 ΔE 0.037
- Milk Chocolate #7F4E1E ΔE 0.052
- Medium Brown #7F5112 ΔE 0.054
- Mud #735C12 ΔE 0.057
- Greeny Brown #696006 ΔE 0.065
- Army Green #4B5D16 ΔE 0.065
Use #644C1B 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.