#669C21
Closest named color: Dark Yellow Green (#728F02). oklch(63.2% 0.159 131.1), rgb(102, 156, 33).
Aa
Black text reads best on this color (6.34:1).
About this color
#669C21 is a medium-light, vivid green. In OKLCH its lightness is 63%, its chroma 0.159 and its hue 131°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Yellow Green (#728F02), ΔE 0.036 away. Black text reads best on it, at 6.34:1.
| Hue family | Greens |
| Lightness | medium-light (63%) |
| Chroma | vivid (0.159) |
| Temperature | in between |
| Nearest name | Dark Yellow Green (#728F02) |
| Black text | 6.34:1 |
| White text | 3.31:1 |
Values
| HEX | #669C21 |
| RGB | rgb(102, 156, 33) |
| HSL | hsl(86, 65%, 37%) |
| OKLCH | oklch(63.2% 0.159 131.1) |
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 #669C21 | 3.31:1 | AA large text | Lc -65.7 | Content text, not long reading |
| Black text on #669C21 | 6.34:1 | AA | Lc 43.8 | Non-text elements, placeholder text |
| #669C21 text on white | 3.31:1 | AA large text | Lc 60.3 | Content text, not long reading |
| #669C21 text on black | 6.34:1 | AA | Lc -41.4 | 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 500.
-
Step 50
50
#F3F7F0
oklch(97.1% 0.01 131.4)
-
Step 100
100
#E5EDDE
oklch(93.6% 0.022 130)
-
Step 200
200
#CFDFC2
oklch(88.4% 0.043 131)
-
Step 300
300
#AFCB97
oklch(80.8% 0.077 131)
-
Step 400
400
#85B05B
oklch(70.6% 0.123 131)
-
Step 500
500 (this color)
#669C21
oklch(63.2% 0.159 131.1)
-
Step 600
600
#528400
oklch(55.6% 0.152 131.1)
-
Step 700
700
#446F00
oklch(49.1% 0.134 131.1)
-
Step 800
800
#375B00
oklch(42.7% 0.117 131.1)
-
Step 900
900
#2D4C00
oklch(37.8% 0.103 131.1)
-
Step 950
950
#1B2D05
oklch(27.2% 0.067 130.8)
#669C21 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) | #A39000 | 0.084 |
| Deuteranopia (no green cones) | #9C8C2E | 0.086 |
| Tritanopia (no blue cones) | #689585 | 0.122 |
| Achromatopsia (no color) | #8D8D8D | 0.159 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #669C21
#669C21
oklch(63.2% 0.159 131.1)
- #A86ACF
#A86ACF
oklch(63.2% 0.158 311)
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 #669C21, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Yellow Green #728F02 ΔE 0.036
- Mid Green #50A747 ΔE 0.036
- Flat Green #699D4C ΔE 0.036
- Muted Green #5FA052 ΔE 0.039
- Grassy Green #419C03 ΔE 0.040
- Grass Green #3F9B0B ΔE 0.041
- Olive Drab #6B8E23 ΔE 0.041
- Leaf Green #5CA904 ΔE 0.041
Use #669C21 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.