#644A2B
Closest named color: Mud Brown (#60460F). oklch(43% 0.058 70.2), rgb(100, 74, 43).
Aa
White text reads best on this color (8.21:1).
About this color
#644A2B is a dark, muted brown. In OKLCH its lightness is 43%, its chroma 0.058 and its hue 70°. Its hue sits on the warm side of the wheel. The nearest named color is Mud Brown (#60460F), ΔE 0.029 away. White text reads best on it, at 8.21:1.
| Hue family | Browns |
| Lightness | dark (43%) |
| Chroma | muted (0.058) |
| Temperature | warm |
| Nearest name | Mud Brown (#60460F) |
| Black text | 2.55:1 |
| White text | 8.21:1 |
Values
| HEX | #644A2B |
| RGB | rgb(100, 74, 43) |
| HSL | hsl(33, 40%, 28%) |
| OKLCH | oklch(43% 0.058 70.2) |
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 #644A2B | 8.21:1 | AAA | Lc -92.9 | Preferred for body text |
| Black text on #644A2B | 2.55:1 | Fails | Lc 15.7 | Dividers and decoration only |
| #644A2B text on white | 8.21:1 | AAA | Lc 88.3 | Fine for body text |
| #644A2B text on black | 2.55:1 | 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
#EEE9E3
oklch(93.6% 0.01 72.7)
-
Step 200
200
#E1D7CC
oklch(88.4% 0.019 70.2)
-
Step 300
300
#CFBDAA
oklch(80.8% 0.033 68.8)
-
Step 400
400
#B79B7C
oklch(70.7% 0.054 69.6)
-
Step 500
500
#A5825B
oklch(63.1% 0.069 69.1)
-
Step 600
600
#906B41
oklch(55.6% 0.075 68.8)
-
Step 700
700
#7A5A32
oklch(49.2% 0.07 71.1)
-
Step 800
800 (this color)
#644A2B
oklch(43% 0.058 70.2)
-
Step 900
900
#513D27
oklch(37.6% 0.044 68.5)
-
Step 950
950
#2F2417
oklch(26.9% 0.028 70.9)
#644A2B 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) | #534B28 | 0.031 |
| Deuteranopia (no green cones) | #59512C | 0.027 |
| Tritanopia (no blue cones) | #6C4442 | 0.046 |
| Achromatopsia (no color) | #4F4F4F | 0.058 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644A2B
#644A2B
oklch(43% 0.058 70.2)
- #37526E
#37526E
oklch(42.9% 0.057 250.1)
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 #644A2B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mud Brown #60460F ΔE 0.029
- Olive Brown #645403 ΔE 0.050
- Green Brown #544E03 ΔE 0.052
- Milk Chocolate #7F4E1E ΔE 0.054
- Medium Brown #7F5112 ΔE 0.060
- Purple Brown #673A3F ΔE 0.063
- Mud #735C12 ΔE 0.070
- Brownish Purple #76424E ΔE 0.073
Use #644A2B 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.