#644F11
Closest named color: Olive Brown (#645403). oklch(43.8% 0.081 88.9), rgb(100, 79, 17).
Aa
White text reads best on this color (7.87:1).
About this color
#644F11 is a dark, moderately saturated brown. In OKLCH its lightness is 44%, its chroma 0.081 and its hue 89°. Its hue sits on the warm side of the wheel. The nearest named color is Olive Brown (#645403), ΔE 0.018 away. White text reads best on it, at 7.87:1.
| Hue family | Browns |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.081) |
| Temperature | warm |
| Nearest name | Olive Brown (#645403) |
| Black text | 2.66:1 |
| White text | 7.87:1 |
Values
| HEX | #644F11 |
| RGB | rgb(100, 79, 17) |
| HSL | hsl(45, 71%, 23%) |
| OKLCH | oklch(43.8% 0.081 88.9) |
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 #644F11 | 7.87:1 | AAA | Lc -91.9 | Preferred for body text |
| Black text on #644F11 | 2.66:1 | Fails | Lc 16.8 | Dividers and decoration only |
| #644F11 text on white | 7.87:1 | AAA | Lc 87.2 | Fine for body text |
| #644F11 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
#F7F5F1
oklch(97.1% 0.006 84.6)
-
Step 100
100
#EDEAE0
oklch(93.7% 0.014 93)
-
Step 200
200
#E0D9C6
oklch(88.6% 0.027 90.1)
-
Step 300
300
#CDC09E
oklch(81% 0.048 89.6)
-
Step 400
400
#B49F69
oklch(70.8% 0.076 89.1)
-
Step 500
500
#A1863E
oklch(63% 0.097 88.8)
-
Step 600
600
#8C6F18
oklch(55.5% 0.105 88.8)
-
Step 700
700
#775D06
oklch(49.1% 0.098 89.1)
-
Step 800
800 (this color)
#644F11
oklch(43.8% 0.081 88.9)
-
Step 900
900
#4F4014
oklch(37.8% 0.064 89.9)
-
Step 950
950
#2E250D
oklch(26.9% 0.04 88.9)
#644F11 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) | #594E05 | 0.022 |
| Deuteranopia (no green cones) | #5E5415 | 0.017 |
| Tritanopia (no blue cones) | #6D4743 | 0.074 |
| Achromatopsia (no color) | #525252 | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644F11
#644F11
oklch(43.8% 0.081 88.9)
- #3F4F7F
#3F4F7F
oklch(43.7% 0.082 268.9)
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 #644F11, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Olive Brown #645403 ΔE 0.018
- Mud Brown #60460F ΔE 0.028
- Green Brown #544E03 ΔE 0.031
- Mud #735C12 ΔE 0.048
- Medium Brown #7F5112 ΔE 0.051
- Greeny Brown #696006 ΔE 0.053
- Milk Chocolate #7F4E1E ΔE 0.053
- Army Green #4B5D16 ΔE 0.055
Use #644F11 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.