#644E23
Closest named color: Mud Brown (#60460F). oklch(43.7% 0.067 82.2), rgb(100, 78, 35).
Aa
White text reads best on this color (7.90:1).
About this color
#644E23 is a dark, muted brown. In OKLCH its lightness is 44%, its chroma 0.067 and its hue 82°. Its hue sits on the warm side of the wheel. The nearest named color is Mud Brown (#60460F), ΔE 0.027 away. White text reads best on it, at 7.90:1.
| Hue family | Browns |
| Lightness | dark (44%) |
| Chroma | muted (0.067) |
| Temperature | warm |
| Nearest name | Mud Brown (#60460F) |
| Black text | 2.65:1 |
| White text | 7.90:1 |
Values
| HEX | #644E23 |
| RGB | rgb(100, 78, 35) |
| HSL | hsl(40, 48%, 26%) |
| OKLCH | oklch(43.7% 0.067 82.2) |
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 #644E23 | 7.90:1 | AAA | Lc -92.1 | Preferred for body text |
| Black text on #644E23 | 2.65:1 | Fails | Lc 16.7 | Dividers and decoration only |
| #644E23 text on white | 7.90:1 | AAA | Lc 87.3 | Fine for body text |
| #644E23 text on black | 2.65:1 | Fails | Lc -14.8 | 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
#F7F5F2
oklch(97.1% 0.005 78.3)
-
Step 100
100
#EEE9E2
oklch(93.6% 0.011 76.6)
-
Step 200
200
#E0D8C9
oklch(88.5% 0.022 83.3)
-
Step 300
300
#CDBFA5
oklch(80.9% 0.039 83)
-
Step 400
400
#B49D74
oklch(70.6% 0.062 81.7)
-
Step 500
500
#A1854F
oklch(63.1% 0.08 82.8)
-
Step 600
600
#8C6E32
oklch(55.5% 0.087 82.6)
-
Step 700
700
#775C25
oklch(49.1% 0.08 82.6)
-
Step 800
800 (this color)
#644E23
oklch(43.7% 0.067 82.2)
-
Step 900
900
#4F3F20
oklch(37.7% 0.051 82.6)
-
Step 950
950
#2E2513
oklch(27% 0.033 83.8)
#644E23 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) | #574E1F | 0.024 |
| Deuteranopia (no green cones) | #5D5424 | 0.021 |
| Tritanopia (no blue cones) | #6C4744 | 0.059 |
| Achromatopsia (no color) | #515151 | 0.067 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644E23
#644E23
oklch(43.7% 0.067 82.2)
- #3E5277
#3E5277
oklch(43.9% 0.066 262.2)
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 #644E23, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mud Brown #60460F ΔE 0.027
- Olive Brown #645403 ΔE 0.033
- Green Brown #544E03 ΔE 0.041
- Milk Chocolate #7F4E1E ΔE 0.050
- Medium Brown #7F5112 ΔE 0.052
- Mud #735C12 ΔE 0.055
- Greeny Brown #696006 ΔE 0.063
- Army Green #4B5D16 ΔE 0.064
Use #644E23 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.