#644E31
Closest named color: Mud Brown (#60460F). oklch(44% 0.052 73.4), rgb(100, 78, 49).
Aa
White text reads best on this color (7.84:1).
About this color
#644E31 is a dark, muted brown. In OKLCH its lightness is 44%, its chroma 0.052 and its hue 73°. Its hue sits on the warm side of the wheel. The nearest named color is Mud Brown (#60460F), ΔE 0.038 away. White text reads best on it, at 7.84:1.
| Hue family | Browns |
| Lightness | dark (44%) |
| Chroma | muted (0.052) |
| Temperature | warm |
| Nearest name | Mud Brown (#60460F) |
| Black text | 2.67:1 |
| White text | 7.84:1 |
Values
| HEX | #644E31 |
| RGB | rgb(100, 78, 49) |
| HSL | hsl(34, 34%, 29%) |
| OKLCH | oklch(44% 0.052 73.4) |
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 #644E31 | 7.84:1 | AAA | Lc -91.9 | Preferred for body text |
| Black text on #644E31 | 2.67:1 | Fails | Lc 16.8 | Dividers and decoration only |
| #644E31 text on white | 7.84:1 | AAA | Lc 87.2 | Fine for body text |
| #644E31 text on black | 2.67:1 | Fails | Lc -14.9 | 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
#EDE9E4
oklch(93.6% 0.008 73.7)
-
Step 200
200
#E0D8CD
oklch(88.6% 0.017 76.1)
-
Step 300
300
#CDBEAB
oklch(80.9% 0.031 73.8)
-
Step 400
400
#B49C7F
oklch(70.7% 0.049 72.2)
-
Step 500
500
#A1845F
oklch(63.1% 0.063 73.1)
-
Step 600
600
#8C6D45
oklch(55.6% 0.068 72.7)
-
Step 700
700
#765B37
oklch(49% 0.062 73.5)
-
Step 800
800 (this color)
#644E31
oklch(44% 0.052 73.4)
-
Step 900
900
#4F3E29
oklch(37.6% 0.041 72)
-
Step 950
950
#2E2518
oklch(27.1% 0.026 76.4)
#644E31 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) | #564F2F | 0.025 |
| Deuteranopia (no green cones) | #5B5432 | 0.022 |
| Tritanopia (no blue cones) | #6C4847 | 0.045 |
| Achromatopsia (no color) | #525252 | 0.052 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644E31
#644E31
oklch(44% 0.052 73.4)
- #3E546F
#3E546F
oklch(43.9% 0.052 253.9)
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 #644E31, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mud Brown #60460F ΔE 0.038
- Olive Brown #645403 ΔE 0.048
- Milk Chocolate #7F4E1E ΔE 0.052
- Green Brown #544E03 ΔE 0.055
- Medium Brown #7F5112 ΔE 0.057
- Mud #735C12 ΔE 0.063
- Purple Brown #673A3F ΔE 0.068
- Brownish Purple #76424E ΔE 0.072
Use #644E31 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.