#644C00
Closest named color: Mud Brown (#60460F). oklch(43% 0.088 87.7), rgb(100, 76, 0).
Aa
White text reads best on this color (8.15:1).
About this color
#644C00 is a dark, moderately saturated brown. In OKLCH its lightness is 43%, its chroma 0.088 and its hue 88°. Its hue sits on the warm side of the wheel. The nearest named color is Mud Brown (#60460F), ΔE 0.023 away. White text reads best on it, at 8.15:1.
| Hue family | Browns |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.088) |
| Temperature | warm |
| Nearest name | Mud Brown (#60460F) |
| Black text | 2.57:1 |
| White text | 8.15:1 |
Values
| HEX | #644C00 |
| RGB | rgb(100, 76, 0) |
| HSL | hsl(46, 100%, 20%) |
| OKLCH | oklch(43% 0.088 87.7) |
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 #644C00 | 8.15:1 | AAA | Lc -92.7 | Preferred for body text |
| Black text on #644C00 | 2.57:1 | Fails | Lc 16.0 | Dividers and decoration only |
| #644C00 text on white | 8.15:1 | AAA | Lc 88.0 | Fine for body text |
| #644C00 text on black | 2.57:1 | Fails | Lc -14.1 | 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
#F7F5F0
oklch(97% 0.007 88.6)
-
Step 100
100
#EEE9DF
oklch(93.5% 0.014 84.6)
-
Step 200
200
#E1D8C4
oklch(88.4% 0.029 86.6)
-
Step 300
300
#CFBF9B
oklch(80.9% 0.052 86.9)
-
Step 400
400
#B69E63
oklch(70.7% 0.083 88.1)
-
Step 500
500
#A48535
oklch(63% 0.105 87.6)
-
Step 600
600
#8F6E00
oklch(55.5% 0.114 87.7)
-
Step 700
700
#795C00
oklch(49.1% 0.1 87.1)
-
Step 800
800 (this color)
#644C00
oklch(43% 0.088 87.7)
-
Step 900
900
#513F0E
oklch(37.7% 0.069 87.6)
-
Step 950
950
#2F250B
oklch(27% 0.043 88.1)
#644C00 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) | #574C00 | 0.024 |
| Deuteranopia (no green cones) | #5D5205 | 0.020 |
| Tritanopia (no blue cones) | #6E4440 | 0.080 |
| Achromatopsia (no color) | #4F4F4F | 0.088 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644C00
#644C00
oklch(43% 0.088 87.7)
- #3B4D80
#3B4D80
oklch(43% 0.088 267.9)
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 #644C00, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mud Brown #60460F ΔE 0.023
- Olive Brown #645403 ΔE 0.023
- Green Brown #544E03 ΔE 0.029
- Mud #735C12 ΔE 0.055
- Medium Brown #7F5112 ΔE 0.056
- Milk Chocolate #7F4E1E ΔE 0.058
- Greeny Brown #696006 ΔE 0.059
- Army Green #4B5D16 ΔE 0.059
Use #644C00 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.