#668100
Closest named color: Olive Green (#677A04). oklch(56.2% 0.138 123), rgb(102, 129, 0).
Aa
Black text reads best on this color (4.70:1).
About this color
#668100 is a medium-dark, moderately saturated yellow. In OKLCH its lightness is 56%, its chroma 0.138 and its hue 123°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Olive Green (#677A04), ΔE 0.021 away. Black text reads best on it, at 4.70:1.
| Hue family | Yellows |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.138) |
| Temperature | in between |
| Nearest name | Olive Green (#677A04) |
| Black text | 4.70:1 |
| White text | 4.46:1 |
Values
| HEX | #668100 |
| RGB | rgb(102, 129, 0) |
| HSL | hsl(73, 100%, 25%) |
| OKLCH | oklch(56.2% 0.138 123) |
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 #668100 | 4.46:1 | AA large text | Lc -76.2 | Fine for body text |
| Black text on #668100 | 4.70:1 | AA | Lc 33.3 | Non-text elements, placeholder text |
| #668100 text on white | 4.46:1 | AA large text | Lc 70.8 | Content text, not long reading |
| #668100 text on black | 4.70:1 | AA | Lc -30.9 | Non-text elements, placeholder text |
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 600.
-
Step 50
50
#F4F6F0
oklch(97% 0.008 121.6)
-
Step 100
100
#E7ECDF
oklch(93.6% 0.018 124)
-
Step 200
200
#D5DDC5
oklch(88.5% 0.033 122.1)
-
Step 300
300
#B9C89C
oklch(81% 0.062 123.1)
-
Step 400
400
#95AB64
oklch(70.7% 0.099 123)
-
Step 500
500
#7B9535
oklch(63% 0.126 122.9)
-
Step 600
600 (this color)
#668100
oklch(56.2% 0.138 123)
-
Step 700
700
#546B00
oklch(49.1% 0.121 123.1)
-
Step 800
800
#445800
oklch(42.8% 0.106 123.5)
-
Step 900
900
#39480E
oklch(37.6% 0.082 123.2)
-
Step 950
950
#222A0B
oklch(26.9% 0.051 122.1)
#668100 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) | #897800 | 0.057 |
| Deuteranopia (no green cones) | #867716 | 0.057 |
| Tritanopia (no blue cones) | #6C7A6D | 0.115 |
| Achromatopsia (no color) | #777777 | 0.138 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #668100
#668100
oklch(56.2% 0.138 123)
- #865EB7
#865EB7
oklch(56.3% 0.138 303)
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 #668100, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Olive Green #677A04 ΔE 0.021
- Murky Green #6C7A0E ΔE 0.023
- Swamp Green #748500 ΔE 0.024
- Sap Green #5C8B15 ΔE 0.029
- Mossy Green #638B27 ΔE 0.029
- Swamp #698339 ΔE 0.035
- Moss Green #658B38 ΔE 0.037
- Olive #808000 ΔE 0.038
Use #668100 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.