#644D05
Closest named color: Olive Brown (#645403). oklch(43.2% 0.086 88.2), rgb(100, 77, 5).
Aa
White text reads best on this color (8.05:1).
About this color
#644D05 is a dark, moderately saturated brown. In OKLCH its lightness is 43%, its chroma 0.086 and its hue 88°. Its hue sits on the warm side of the wheel. The nearest named color is Olive Brown (#645403), ΔE 0.021 away. White text reads best on it, at 8.05:1.
| Hue family | Browns |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.086) |
| Temperature | warm |
| Nearest name | Olive Brown (#645403) |
| Black text | 2.60:1 |
| White text | 8.05:1 |
Values
| HEX | #644D05 |
| RGB | rgb(100, 77, 5) |
| HSL | hsl(45, 90%, 21%) |
| OKLCH | oklch(43.2% 0.086 88.2) |
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 #644D05 | 8.05:1 | AAA | Lc -92.4 | Preferred for body text |
| Black text on #644D05 | 2.60:1 | Fails | Lc 16.3 | Dividers and decoration only |
| #644D05 text on white | 8.05:1 | AAA | Lc 87.7 | Fine for body text |
| #644D05 text on black | 2.60:1 | Fails | Lc -14.4 | 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
#E1D9C5
oklch(88.6% 0.028 88.8)
-
Step 300
300
#CEBF9C
oklch(80.8% 0.05 87.6)
-
Step 400
400
#B59E65
oklch(70.6% 0.08 88.3)
-
Step 500
500
#A38637
oklch(63.2% 0.103 88.8)
-
Step 600
600
#8E6F07
oklch(55.7% 0.112 88.8)
-
Step 700
700
#785C00
oklch(49% 0.1 87.9)
-
Step 800
800 (this color)
#644D05
oklch(43.2% 0.086 88.2)
-
Step 900
900
#503F10
oklch(37.6% 0.067 88.3)
-
Step 950
950
#2F250B
oklch(27% 0.043 88.1)
#644D05 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) | #584C00 | 0.023 |
| Deuteranopia (no green cones) | #5D530A | 0.020 |
| Tritanopia (no blue cones) | #6D4541 | 0.078 |
| Achromatopsia (no color) | #505050 | 0.086 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644D05
#644D05
oklch(43.2% 0.086 88.2)
- #3C4E80
#3C4E80
oklch(43.3% 0.086 267.8)
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 #644D05, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Olive Brown #645403 ΔE 0.021
- Mud Brown #60460F ΔE 0.024
- Green Brown #544E03 ΔE 0.029
- Mud #735C12 ΔE 0.053
- Medium Brown #7F5112 ΔE 0.054
- Milk Chocolate #7F4E1E ΔE 0.056
- Greeny Brown #696006 ΔE 0.057
- Army Green #4B5D16 ΔE 0.058
Use #644D05 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.