#644A2F
Closest named color: Mud Brown (#60460F). oklch(43% 0.054 66.6), rgb(100, 74, 47).
Aa
White text reads best on this color (8.19:1).
About this color
#644A2F is a dark, muted brown. In OKLCH its lightness is 43%, its chroma 0.054 and its hue 67°. Its hue sits on the warm side of the wheel. The nearest named color is Mud Brown (#60460F), ΔE 0.034 away. White text reads best on it, at 8.19:1.
| Hue family | Browns |
| Lightness | dark (43%) |
| Chroma | muted (0.054) |
| Temperature | warm |
| Nearest name | Mud Brown (#60460F) |
| Black text | 2.56:1 |
| White text | 8.19:1 |
Values
| HEX | #644A2F |
| RGB | rgb(100, 74, 47) |
| HSL | hsl(31, 36%, 29%) |
| OKLCH | oklch(43% 0.054 66.6) |
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 #644A2F | 8.19:1 | AAA | Lc -92.9 | Preferred for body text |
| Black text on #644A2F | 2.56:1 | Fails | Lc 15.7 | Dividers and decoration only |
| #644A2F text on white | 8.19:1 | AAA | Lc 88.3 | Fine for body text |
| #644A2F text on black | 2.56:1 | Fails | Lc -13.9 | 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
#EEE9E4
oklch(93.7% 0.009 67.7)
-
Step 200
200
#E1D7CD
oklch(88.4% 0.018 67.6)
-
Step 300
300
#CFBDAC
oklch(80.9% 0.031 65.7)
-
Step 400
400
#B79B80
oklch(70.8% 0.05 65.8)
-
Step 500
500
#A4825F
oklch(63% 0.064 67)
-
Step 600
600
#8F6B46
oklch(55.5% 0.069 66.3)
-
Step 700
700
#7A5937
oklch(49.1% 0.065 66.1)
-
Step 800
800 (this color)
#644A2F
oklch(43% 0.054 66.6)
-
Step 900
900
#513D29
oklch(37.7% 0.042 66)
-
Step 950
950
#2F2418
oklch(27% 0.027 68.7)
#644A2F 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) | #534B2D | 0.031 |
| Deuteranopia (no green cones) | #59512F | 0.028 |
| Tritanopia (no blue cones) | #6C4443 | 0.042 |
| Achromatopsia (no color) | #4F4F4F | 0.054 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644A2F
#644A2F
oklch(43% 0.054 66.6)
- #37536C
#37536C
oklch(43.1% 0.054 246.4)
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 #644A2F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mud Brown #60460F ΔE 0.034
- Olive Brown #645403 ΔE 0.055
- Milk Chocolate #7F4E1E ΔE 0.055
- Green Brown #544E03 ΔE 0.057
- Purple Brown #673A3F ΔE 0.059
- Medium Brown #7F5112 ΔE 0.062
- Brownish Purple #76424E ΔE 0.068
- Mud #735C12 ΔE 0.072
Use #644A2F 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.