#644B03
Closest named color: Mud Brown (#60460F). oklch(42.8% 0.086 86.1), rgb(100, 75, 3).
Aa
White text reads best on this color (8.23:1).
About this color
#644B03 is a dark, moderately saturated brown. In OKLCH its lightness is 43%, its chroma 0.086 and its hue 86°. Its hue sits on the warm side of the wheel. The nearest named color is Mud Brown (#60460F), ΔE 0.019 away. White text reads best on it, at 8.23:1.
| Hue family | Browns |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.086) |
| Temperature | warm |
| Nearest name | Mud Brown (#60460F) |
| Black text | 2.54:1 |
| White text | 8.23:1 |
Values
| HEX | #644B03 |
| RGB | rgb(100, 75, 3) |
| HSL | hsl(45, 94%, 20%) |
| OKLCH | oklch(42.8% 0.086 86.1) |
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 #644B03 | 8.23:1 | AAA | Lc -92.9 | Preferred for body text |
| Black text on #644B03 | 2.54:1 | Fails | Lc 15.7 | Dividers and decoration only |
| #644B03 text on white | 8.23:1 | AAA | Lc 88.3 | Fine for body text |
| #644B03 text on black | 2.54:1 | 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
#F7F5F0
oklch(97% 0.007 88.6)
-
Step 100
100
#EEE9DF
oklch(93.5% 0.014 84.6)
-
Step 200
200
#E1D8C5
oklch(88.4% 0.027 85.7)
-
Step 300
300
#CFBF9C
oklch(80.9% 0.05 86.3)
-
Step 400
400
#B79D65
oklch(70.6% 0.08 85.5)
-
Step 500
500
#A58537
oklch(63.2% 0.103 86.6)
-
Step 600
600
#906E07
oklch(55.7% 0.112 86.6)
-
Step 700
700
#7A5C00
oklch(49.2% 0.101 86.4)
-
Step 800
800 (this color)
#644B03
oklch(42.8% 0.086 86.1)
-
Step 900
900
#513F10
oklch(37.7% 0.067 87.1)
-
Step 950
950
#30250B
oklch(27.1% 0.043 86.1)
#644B03 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) | #564B00 | 0.026 |
| Deuteranopia (no green cones) | #5C5108 | 0.021 |
| Tritanopia (no blue cones) | #6E433F | 0.077 |
| Achromatopsia (no color) | #4F4F4F | 0.086 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644B03
#644B03
oklch(42.8% 0.086 86.1)
- #394D7E
#394D7E
oklch(42.8% 0.085 266.1)
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 #644B03, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mud Brown #60460F ΔE 0.019
- Olive Brown #645403 ΔE 0.026
- Green Brown #544E03 ΔE 0.030
- Medium Brown #7F5112 ΔE 0.056
- Milk Chocolate #7F4E1E ΔE 0.057
- Mud #735C12 ΔE 0.058
- Army Green #4B5D16 ΔE 0.062
- Greeny Brown #696006 ΔE 0.062
Use #644B03 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.