#669C37
Closest named color: Flat Green (#699D4C). oklch(63.3% 0.144 133), rgb(102, 156, 55).
Aa
Black text reads best on this color (6.37:1).
About this color
#669C37 is a medium-light, vivid green. In OKLCH its lightness is 63%, its chroma 0.144 and its hue 133°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Flat Green (#699D4C), ΔE 0.021 away. Black text reads best on it, at 6.37:1.
| Hue family | Greens |
| Lightness | medium-light (63%) |
| Chroma | vivid (0.144) |
| Temperature | in between |
| Nearest name | Flat Green (#699D4C) |
| Black text | 6.37:1 |
| White text | 3.29:1 |
Values
| HEX | #669C37 |
| RGB | rgb(102, 156, 55) |
| HSL | hsl(92, 48%, 41%) |
| OKLCH | oklch(63.3% 0.144 133) |
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 #669C37 | 3.29:1 | AA large text | Lc -65.6 | Content text, not long reading |
| Black text on #669C37 | 6.37:1 | AA | Lc 43.9 | Non-text elements, placeholder text |
| #669C37 text on white | 3.29:1 | AA large text | Lc 60.1 | Content text, not long reading |
| #669C37 text on black | 6.37:1 | AA | Lc -41.6 | 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
#E5EDDF
oklch(93.6% 0.02 131.5)
-
Step 200
200
#CFDFC5
oklch(88.5% 0.039 133.2)
-
Step 300
300
#AFCB9C
oklch(80.9% 0.071 132.9)
-
Step 400
400
#85B065
oklch(70.8% 0.113 132.9)
-
Step 500
500 (this color)
#669C37
oklch(63.3% 0.144 133)
-
Step 600
600
#4C8500
oklch(55.5% 0.157 132.9)
-
Step 700
700
#3F7000
oklch(49.1% 0.138 133)
-
Step 800
800
#335C00
oklch(42.8% 0.12 132.9)
-
Step 900
900
#2D4C0F
oklch(37.9% 0.094 132.9)
-
Step 950
950
#1A2C0B
oklch(26.9% 0.059 133.2)
#669C37 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) | #A2902B | 0.083 |
| Deuteranopia (no green cones) | #9B8C3F | 0.084 |
| Tritanopia (no blue cones) | #679687 | 0.107 |
| Achromatopsia (no color) | #8E8E8E | 0.145 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #669C37
#669C37
oklch(63.3% 0.144 133)
- #A86DC8
#A86DC8
oklch(63.3% 0.145 312.8)
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 #669C37, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Flat Green #699D4C ΔE 0.021
- Muted Green #5FA052 ΔE 0.025
- Off Green #6BA353 ΔE 0.032
- Mid Green #50A747 ΔE 0.033
- Fern #63A950 ΔE 0.038
- Dark Yellow Green #728F02 ΔE 0.038
- Olive Drab #6B8E23 ΔE 0.038
- Drab Green #749551 ΔE 0.043
Use #669C37 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.