#666421
Closest named color: Greeny Brown (#696006). oklch(49.1% 0.088 107.6), rgb(102, 100, 33).
Aa
White text reads best on this color (6.15:1).
About this color
#666421 is a medium-dark, moderately saturated brown. In OKLCH its lightness is 49%, its chroma 0.088 and its hue 108°. Its hue sits on the warm side of the wheel. The nearest named color is Greeny Brown (#696006), ΔE 0.016 away. White text reads best on it, at 6.15:1.
| Hue family | Browns |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.088) |
| Temperature | warm |
| Nearest name | Greeny Brown (#696006) |
| Black text | 3.40:1 |
| White text | 6.15:1 |
Values
| HEX | #666421 |
| RGB | rgb(102, 100, 33) |
| HSL | hsl(58, 51%, 26%) |
| OKLCH | oklch(49.1% 0.088 107.6) |
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 #666421 | 6.15:1 | AA | Lc -85.8 | Fine for body text |
| Black text on #666421 | 3.40:1 | AA large text | Lc 23.4 | Dividers and decoration only |
| #666421 text on white | 6.15:1 | AA | Lc 80.7 | Fine for body text |
| #666421 text on black | 3.40:1 | AA large text | Lc -21.2 | 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
#F6F6F1
oklch(97.2% 0.007 106.5)
-
Step 100
100
#EAEBE1
oklch(93.7% 0.013 111.3)
-
Step 200
200
#DADBC9
oklch(88.6% 0.024 109.5)
-
Step 300
300
#C3C3A4
oklch(80.9% 0.042 107.3)
-
Step 400
400
#A5A472
oklch(70.7% 0.068 107.1)
-
Step 500
500
#8F8D4D
oklch(63% 0.086 107)
-
Step 600
600
#79772F
oklch(55.6% 0.094 107.6)
-
Step 700
700 (this color)
#666421
oklch(49.1% 0.088 107.6)
-
Step 800
800
#53521D
oklch(42.8% 0.073 108.1)
-
Step 900
900
#45441E
oklch(37.8% 0.057 107.5)
-
Step 950
950
#282812
oklch(27.1% 0.037 108.6)
#666421 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) | #6C6018 | 0.014 |
| Deuteranopia (no green cones) | #6E6325 | 0.015 |
| Tritanopia (no blue cones) | #6D5D56 | 0.080 |
| Achromatopsia (no color) | #616161 | 0.088 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #666421
#666421
oklch(49.1% 0.088 107.6)
- #5E5890
#5E5890
oklch(49.1% 0.088 287.6)
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 #666421, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greeny Brown #696006 ΔE 0.016
- Mud Green #606602 ΔE 0.024
- Dark Moss Green #606C38 ΔE 0.027
- Mud #735C12 ΔE 0.028
- Dark Olive Green #556B2F ΔE 0.029
- Camo Green #526525 ΔE 0.030
- Brown Green #706C11 ΔE 0.033
- Browny Green #6F6C0A ΔE 0.033
Use #666421 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.