#646B1F
Closest named color: Browny Green (#6F6C0A). oklch(50.6% 0.098 114.5), rgb(100, 107, 31).
Aa
White text reads best on this color (5.73:1).
About this color
#646B1F is a medium-dark, moderately saturated yellow. In OKLCH its lightness is 51%, its chroma 0.098 and its hue 114°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Browny Green (#6F6C0A), ΔE 0.019 away. White text reads best on it, at 5.73:1.
| Hue family | Yellows |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.098) |
| Temperature | in between |
| Nearest name | Browny Green (#6F6C0A) |
| Black text | 3.66:1 |
| White text | 5.73:1 |
Values
| HEX | #646B1F |
| RGB | rgb(100, 107, 31) |
| HSL | hsl(66, 55%, 27%) |
| OKLCH | oklch(50.6% 0.098 114.5) |
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 #646B1F | 5.73:1 | AA | Lc -83.8 | Fine for body text |
| Black text on #646B1F | 3.66:1 | AA large text | Lc 25.5 | Dividers and decoration only |
| #646B1F text on white | 5.73:1 | AA | Lc 78.6 | Fine for body text |
| #646B1F text on black | 3.66:1 | AA large text | Lc -23.2 | 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 700.
-
Step 50
50
#F5F6F1
oklch(97.1% 0.007 115.7)
-
Step 100
100
#E9EBE1
oklch(93.6% 0.013 115.8)
-
Step 200
200
#D8DBC8
oklch(88.4% 0.026 114.2)
-
Step 300
300
#BFC5A2
oklch(80.9% 0.048 115.4)
-
Step 400
400
#9FA66F
oklch(70.6% 0.075 114.3)
-
Step 500
500
#889048
oklch(63% 0.096 114.4)
-
Step 600
600
#727A27
oklch(55.6% 0.106 114.6)
-
Step 700
700 (this color)
#646B1F
oklch(50.6% 0.098 114.5)
-
Step 800
800
#4E5418
oklch(42.7% 0.082 114.8)
-
Step 900
900
#41451B
oklch(37.6% 0.062 113.9)
-
Step 950
950
#262911
oklch(27.1% 0.04 115)
#646B1F 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) | #736614 | 0.025 |
| Deuteranopia (no green cones) | #736725 | 0.028 |
| Tritanopia (no blue cones) | #6B655C | 0.086 |
| Achromatopsia (no color) | #666666 | 0.098 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #646B1F
#646B1F
oklch(50.6% 0.098 114.5)
- #695997
#695997
oklch(50.7% 0.097 294.5)
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 #646B1F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Browny Green #6F6C0A ΔE 0.019
- Brown Green #706C11 ΔE 0.020
- Mud Green #606602 ΔE 0.021
- Dark Olive Green #556B2F ΔE 0.024
- Dark Moss Green #606C38 ΔE 0.024
- Muddy Green #657432 ΔE 0.028
- Greeny Brown #696006 ΔE 0.031
- Camo Green #526525 ΔE 0.034
Use #646B1F 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.