#644F00
Closest named color: Olive Brown (#645403). oklch(43.7% 0.089 91.1), rgb(100, 79, 0).
Aa
White text reads best on this color (7.89:1).
About this color
#644F00 is a dark, moderately saturated brown. In OKLCH its lightness is 44%, its chroma 0.089 and its hue 91°. Its hue sits on the warm side of the wheel. The nearest named color is Olive Brown (#645403), ΔE 0.014 away. White text reads best on it, at 7.89:1.
| Hue family | Browns |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.089) |
| Temperature | warm |
| Nearest name | Olive Brown (#645403) |
| Black text | 2.66:1 |
| White text | 7.89:1 |
Values
| HEX | #644F00 |
| RGB | rgb(100, 79, 0) |
| HSL | hsl(47, 100%, 20%) |
| OKLCH | oklch(43.7% 0.089 91.1) |
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 #644F00 | 7.89:1 | AAA | Lc -91.9 | Preferred for body text |
| Black text on #644F00 | 2.66:1 | Fails | Lc 16.8 | Dividers and decoration only |
| #644F00 text on white | 7.89:1 | AAA | Lc 87.2 | Fine for body text |
| #644F00 text on black | 2.66:1 | Fails | Lc -14.9 | 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
#EDEADF
oklch(93.6% 0.015 94.2)
-
Step 200
200
#E0D9C4
oklch(88.5% 0.029 91.7)
-
Step 300
300
#CDC09B
oklch(80.9% 0.052 91)
-
Step 400
400
#B49F62
oklch(70.7% 0.084 91.1)
-
Step 500
500
#A28733
oklch(63.2% 0.107 91)
-
Step 600
600
#8C7000
oklch(55.6% 0.114 91.4)
-
Step 700
700
#765E00
oklch(49.2% 0.101 91.4)
-
Step 800
800 (this color)
#644F00
oklch(43.7% 0.089 91.1)
-
Step 900
900
#4F400C
oklch(37.7% 0.07 91.9)
-
Step 950
950
#2E250A
oklch(26.8% 0.043 90.7)
#644F00 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) | #5A4E00 | 0.019 |
| Deuteranopia (no green cones) | #5F5406 | 0.016 |
| Tritanopia (no blue cones) | #6D4742 | 0.081 |
| Achromatopsia (no color) | #515151 | 0.089 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644F00
#644F00
oklch(43.7% 0.089 91.1)
- #404E83
#404E83
oklch(43.8% 0.089 271.1)
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 #644F00, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Olive Brown #645403 ΔE 0.014
- Green Brown #544E03 ΔE 0.029
- Mud Brown #60460F ΔE 0.031
- Mud #735C12 ΔE 0.048
- Greeny Brown #696006 ΔE 0.051
- Army Green #4B5D16 ΔE 0.053
- Medium Brown #7F5112 ΔE 0.053
- Milk Chocolate #7F4E1E ΔE 0.057
Use #644F00 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.