#646A17
Closest named color: Mud Green (#606602). oklch(50.3% 0.103 113.7), rgb(100, 106, 23).
Aa
White text reads best on this color (5.80:1).
About this color
#646A17 is a medium-dark, moderately saturated yellow. In OKLCH its lightness is 50%, its chroma 0.103 and its hue 114°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Mud Green (#606602), ΔE 0.016 away. White text reads best on it, at 5.80:1.
| Hue family | Yellows |
| Lightness | medium-dark (50%) |
| Chroma | moderately saturated (0.103) |
| Temperature | in between |
| Nearest name | Mud Green (#606602) |
| Black text | 3.61:1 |
| White text | 5.80:1 |
Values
| HEX | #646A17 |
| RGB | rgb(100, 106, 23) |
| HSL | hsl(64, 64%, 25%) |
| OKLCH | oklch(50.3% 0.103 113.7) |
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 #646A17 | 5.80:1 | AA | Lc -84.2 | Fine for body text |
| Black text on #646A17 | 3.61:1 | AA large text | Lc 25.1 | Dividers and decoration only |
| #646A17 text on white | 5.80:1 | AA | Lc 79.0 | Fine for body text |
| #646A17 text on black | 3.61:1 | AA large text | Lc -22.8 | 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 700.
-
Step 50
50
#F5F6F1
oklch(97.1% 0.007 115.7)
-
Step 100
100
#E9EBE0
oklch(93.6% 0.015 115)
-
Step 200
200
#D8DBC7
oklch(88.4% 0.027 113.9)
-
Step 300
300
#C0C5A0
oklch(81% 0.05 113.8)
-
Step 400
400
#A0A66C
oklch(70.6% 0.079 113.2)
-
Step 500
500
#899043
oklch(63.1% 0.101 113.6)
-
Step 600
600
#737A21
oklch(55.6% 0.11 113.9)
-
Step 700
700 (this color)
#646A17
oklch(50.3% 0.103 113.7)
-
Step 800
800
#4F5413
oklch(42.8% 0.085 113.8)
-
Step 900
900
#414518
oklch(37.6% 0.066 113.8)
-
Step 950
950
#26290F
oklch(27.1% 0.043 114.7)
#646A17 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) | #726405 | 0.025 |
| Deuteranopia (no green cones) | #72661E | 0.027 |
| Tritanopia (no blue cones) | #6B635A | 0.091 |
| Achromatopsia (no color) | #656565 | 0.103 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #646A17
#646A17
oklch(50.3% 0.103 113.7)
- #675799
#675799
oklch(50.2% 0.104 293.5)
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 #646A17, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mud Green #606602 ΔE 0.016
- Browny Green #6F6C0A ΔE 0.019
- Brown Green #706C11 ΔE 0.020
- Dark Olive Green #556B2F ΔE 0.026
- Greeny Brown #696006 ΔE 0.028
- Dark Moss Green #606C38 ΔE 0.029
- Muddy Green #657432 ΔE 0.032
- Camo Green #526525 ΔE 0.033
Use #646A17 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.