#645221
Closest named color: Olive Brown (#645403). oklch(44.6% 0.071 89), rgb(100, 82, 33).
Aa
White text reads best on this color (7.57:1).
About this color
#645221 is a dark, moderately saturated brown. In OKLCH its lightness is 45%, its chroma 0.071 and its hue 89°. Its hue sits on the warm side of the wheel. The nearest named color is Olive Brown (#645403), ΔE 0.023 away. White text reads best on it, at 7.57:1.
| Hue family | Browns |
| Lightness | dark (45%) |
| Chroma | moderately saturated (0.071) |
| Temperature | warm |
| Nearest name | Olive Brown (#645403) |
| Black text | 2.77:1 |
| White text | 7.57:1 |
Values
| HEX | #645221 |
| RGB | rgb(100, 82, 33) |
| HSL | hsl(44, 50%, 26%) |
| OKLCH | oklch(44.6% 0.071 89) |
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 #645221 | 7.57:1 | AAA | Lc -91.1 | Preferred for body text |
| Black text on #645221 | 2.77:1 | Fails | Lc 17.8 | Dividers and decoration only |
| #645221 text on white | 7.57:1 | AAA | Lc 86.3 | Fine for body text |
| #645221 text on black | 2.77:1 | Fails | Lc -15.8 | 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
#F7F5F1
oklch(97.1% 0.006 84.6)
-
Step 100
100
#EDEAE1
oklch(93.7% 0.012 91.5)
-
Step 200
200
#DFD9C8
oklch(88.5% 0.024 90.8)
-
Step 300
300
#CBC0A3
oklch(80.9% 0.041 89.7)
-
Step 400
400
#B19F71
oklch(70.7% 0.066 89.1)
-
Step 500
500
#9E874A
oklch(63.1% 0.085 89.2)
-
Step 600
600
#89702C
oklch(55.6% 0.092 88.7)
-
Step 700
700
#745E1E
oklch(49.1% 0.086 89.5)
-
Step 800
800 (this color)
#645221
oklch(44.6% 0.071 89)
-
Step 900
900
#4D401C
oklch(37.7% 0.056 89.7)
-
Step 950
950
#2D2611
oklch(27.1% 0.036 91.5)
#645221 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) | #5B511C | 0.018 |
| Deuteranopia (no green cones) | #605623 | 0.013 |
| Tritanopia (no blue cones) | #6C4B47 | 0.064 |
| Achromatopsia (no color) | #545454 | 0.071 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #645221
#645221
oklch(44.6% 0.071 89)
- #44527C
#44527C
oklch(44.6% 0.072 269.3)
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 #645221, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Olive Brown #645403 ΔE 0.023
- Mud Brown #60460F ΔE 0.036
- Green Brown #544E03 ΔE 0.039
- Mud #735C12 ΔE 0.044
- Medium Brown #7F5112 ΔE 0.049
- Milk Chocolate #7F4E1E ΔE 0.050
- Greeny Brown #696006 ΔE 0.050
- Army Green #4B5D16 ΔE 0.055
Use #645221 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.