#669E5A
Closest named color: Flat Green (#699D4C). oklch(64.3% 0.114 140.1), rgb(102, 158, 90).
Aa
Black text reads best on this color (6.60:1).
About this color
#669E5A is a medium-light, moderately saturated green. In OKLCH its lightness is 64%, its chroma 0.114 and its hue 140°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Flat Green (#699D4C), ΔE 0.015 away. Black text reads best on it, at 6.60:1.
| Hue family | Greens |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.114) |
| Temperature | in between |
| Nearest name | Flat Green (#699D4C) |
| Black text | 6.60:1 |
| White text | 3.18:1 |
Values
| HEX | #669E5A |
| RGB | rgb(102, 158, 90) |
| HSL | hsl(109, 27%, 49%) |
| OKLCH | oklch(64.3% 0.114 140.1) |
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 #669E5A | 3.18:1 | AA large text | Lc -64.3 | Content text, not long reading |
| Black text on #669E5A | 6.60:1 | AA | Lc 45.2 | Large or bold text, headings |
| #669E5A text on white | 3.18:1 | AA large text | Lc 58.8 | Large or bold text, headings |
| #669E5A text on black | 6.60:1 | AA | Lc -42.9 | 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 500.
-
Step 50
50
#F3F7F2
oklch(97.2% 0.008 139.4)
-
Step 100
100
#E4EDE3
oklch(93.7% 0.016 142.6)
-
Step 200
200
#CFDFCB
oklch(88.6% 0.032 139.4)
-
Step 300
300
#AECAA8
oklch(80.9% 0.056 140.1)
-
Step 400
400
#83AF79
oklch(70.8% 0.09 139.9)
-
Step 500
500 (this color)
#669E5A
oklch(64.3% 0.114 140.1)
-
Step 600
600
#48843B
oklch(55.5% 0.123 140.1)
-
Step 700
700
#39702D
oklch(49.1% 0.115 140.1)
-
Step 800
800
#305B26
oklch(42.6% 0.095 139.9)
-
Step 900
900
#2B4B24
oklch(37.7% 0.074 140)
-
Step 950
950
#192C15
oklch(27% 0.048 140.2)
#669E5A 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) | #A29455 | 0.081 |
| Deuteranopia (no green cones) | #998E5E | 0.080 |
| Tritanopia (no blue cones) | #629A8D | 0.075 |
| Achromatopsia (no color) | #909090 | 0.114 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #669E5A
#669E5A
oklch(64.3% 0.114 140.1)
- #AC75B8
#AC75B8
oklch(64.3% 0.115 320.3)
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 #669E5A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Flat Green #699D4C ΔE 0.015
- Muted Green #5FA052 ΔE 0.015
- Off Green #6BA353 ΔE 0.020
- Moss #769958 ΔE 0.022
- Drab Green #749551 ΔE 0.027
- Dull Green #74A662 ΔE 0.030
- Fern #63A950 ΔE 0.037
- Algae #54AC68 ΔE 0.039
Use #669E5A 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.