#644F18
Closest named color: Olive Brown (#645403). oklch(43.8% 0.077 87.4), rgb(100, 79, 24).
Aa
White text reads best on this color (7.85:1).
About this color
#644F18 is a dark, moderately saturated brown. In OKLCH its lightness is 44%, its chroma 0.077 and its hue 87°. Its hue sits on the warm side of the wheel. The nearest named color is Olive Brown (#645403), ΔE 0.022 away. White text reads best on it, at 7.85:1.
| Hue family | Browns |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.077) |
| Temperature | warm |
| Nearest name | Olive Brown (#645403) |
| Black text | 2.67:1 |
| White text | 7.85:1 |
Values
| HEX | #644F18 |
| RGB | rgb(100, 79, 24) |
| HSL | hsl(43, 61%, 24%) |
| OKLCH | oklch(43.8% 0.077 87.4) |
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 #644F18 | 7.85:1 | AAA | Lc -91.9 | Preferred for body text |
| Black text on #644F18 | 2.67:1 | Fails | Lc 16.9 | Dividers and decoration only |
| #644F18 text on white | 7.85:1 | AAA | Lc 87.2 | Fine for body text |
| #644F18 text on black | 2.67:1 | Fails | Lc -15.0 | 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
#EDE9E0
oklch(93.5% 0.013 86.8)
-
Step 200
200
#E0D8C7
oklch(88.4% 0.025 85.8)
-
Step 300
300
#CDBFA0
oklch(80.8% 0.045 86.6)
-
Step 400
400
#B49E6C
oklch(70.7% 0.072 86.8)
-
Step 500
500
#A18644
oklch(63.1% 0.091 87.4)
-
Step 600
600
#8C6F22
oklch(55.6% 0.099 87.4)
-
Step 700
700
#775D14
oklch(49.2% 0.092 87.6)
-
Step 800
800 (this color)
#644F18
oklch(43.8% 0.077 87.4)
-
Step 900
900
#4F3F18
oklch(37.6% 0.06 86.8)
-
Step 950
950
#2E250F
oklch(26.9% 0.038 87.5)
#644F18 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) | #594E10 | 0.022 |
| Deuteranopia (no green cones) | #5E541B | 0.017 |
| Tritanopia (no blue cones) | #6D4844 | 0.069 |
| Achromatopsia (no color) | #525252 | 0.077 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644F18
#644F18
oklch(43.8% 0.077 87.4)
- #3F507C
#3F507C
oklch(43.7% 0.076 267.2)
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 #644F18, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Olive Brown #645403 ΔE 0.022
- Mud Brown #60460F ΔE 0.027
- Green Brown #544E03 ΔE 0.034
- Mud #735C12 ΔE 0.049
- Medium Brown #7F5112 ΔE 0.051
- Milk Chocolate #7F4E1E ΔE 0.051
- Greeny Brown #696006 ΔE 0.055
- Army Green #4B5D16 ΔE 0.057
Use #644F18 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.