#644E3F
Closest named color: Mud Brown (#60460F). oklch(44.3% 0.038 55.8), rgb(100, 78, 63).
Aa
White text reads best on this color (7.76:1).
About this color
#644E3F is a dark, muted brown. In OKLCH its lightness is 44%, its chroma 0.038 and its hue 56°. Its hue sits on the warm side of the wheel. The nearest named color is Mud Brown (#60460F), ΔE 0.055 away. White text reads best on it, at 7.76:1.
| Hue family | Browns |
| Lightness | dark (44%) |
| Chroma | muted (0.038) |
| Temperature | warm |
| Nearest name | Mud Brown (#60460F) |
| Black text | 2.70:1 |
| White text | 7.76:1 |
Values
| HEX | #644E3F |
| RGB | rgb(100, 78, 63) |
| HSL | hsl(24, 23%, 32%) |
| OKLCH | oklch(44.3% 0.038 55.8) |
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 #644E3F | 7.76:1 | AAA | Lc -91.7 | Preferred for body text |
| Black text on #644E3F | 2.70:1 | Fails | Lc 17.1 | Dividers and decoration only |
| #644E3F text on white | 7.76:1 | AAA | Lc 86.9 | Fine for body text |
| #644E3F text on black | 2.70:1 | Fails | Lc -15.2 | Dividers and decoration only |
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
#F7F5F3
oklch(97.1% 0.003 67.8)
-
Step 100
100
#EDE9E6
oklch(93.6% 0.006 59.6)
-
Step 200
200
#E0D7D1
oklch(88.5% 0.013 56.2)
-
Step 300
300
#CCBDB3
oklch(80.8% 0.022 56.1)
-
Step 400
400
#B39B8C
oklch(70.7% 0.036 54)
-
Step 500
500
#A0836F
oklch(63.2% 0.046 56.3)
-
Step 600
600
#8A6C57
oklch(55.5% 0.049 56.5)
-
Step 700
700
#755A48
oklch(49% 0.045 55.1)
-
Step 800
800 (this color)
#644E3F
oklch(44.3% 0.038 55.8)
-
Step 900
900
#4E3E32
oklch(37.7% 0.03 58.6)
-
Step 950
950
#2E241E
oklch(27% 0.019 52.6)
#644E3F 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) | #54503E | 0.028 |
| Deuteranopia (no green cones) | #59543F | 0.025 |
| Tritanopia (no blue cones) | #6A4A4A | 0.027 |
| Achromatopsia (no color) | #525252 | 0.038 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644E3F
#644E3F
oklch(44.3% 0.038 55.8)
- #3F5766
#3F5766
oklch(44.3% 0.038 236.2)
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 #644E3F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mud Brown #60460F ΔE 0.055
- Brownish Purple #76424E ΔE 0.057
- Purple Brown #673A3F ΔE 0.058
- Milk Chocolate #7F4E1E ΔE 0.060
- Olive Brown #645403 ΔE 0.067
- Medium Brown #7F5112 ΔE 0.068
- Green Brown #544E03 ΔE 0.072
- Mud #735C12 ΔE 0.077
Use #644E3F 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.