#66917C
Closest named color: Slate Green (#658D6D). oklch(61.9% 0.057 163), rgb(102, 145, 124).
Aa
Black text reads best on this color (5.90:1).
About this color
#66917C is a medium-dark, muted green. In OKLCH its lightness is 62%, its chroma 0.057 and its hue 163°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Slate Green (#658D6D), ΔE 0.022 away. Black text reads best on it, at 5.90:1.
| Hue family | Greens |
| Lightness | medium-dark (62%) |
| Chroma | muted (0.057) |
| Temperature | in between |
| Nearest name | Slate Green (#658D6D) |
| Black text | 5.90:1 |
| White text | 3.55:1 |
Values
| HEX | #66917C |
| RGB | rgb(102, 145, 124) |
| HSL | hsl(151, 17%, 48%) |
| OKLCH | oklch(61.9% 0.057 163) |
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 #66917C | 3.55:1 | AA large text | Lc -68.6 | Content text, not long reading |
| Black text on #66917C | 5.90:1 | AA | Lc 41.0 | Non-text elements, placeholder text |
| #66917C text on white | 3.55:1 | AA large text | Lc 63.1 | Content text, not long reading |
| #66917C text on black | 5.90:1 | AA | Lc -38.6 | 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
#F3F6F5
oklch(97.1% 0.003 174.5)
-
Step 100
100
#E5ECE8
oklch(93.7% 0.009 161.3)
-
Step 200
200
#D0DCD6
oklch(88.4% 0.015 164.7)
-
Step 300
300
#B1C7BB
oklch(81% 0.029 161.9)
-
Step 400
400
#88AA99
oklch(70.8% 0.045 163.4)
-
Step 500
500 (this color)
#66917C
oklch(61.9% 0.057 163)
-
Step 600
600
#507F69
oklch(55.6% 0.062 163.3)
-
Step 700
700
#416B57
oklch(49.1% 0.057 162.7)
-
Step 800
800
#365747
oklch(42.6% 0.047 162.5)
-
Step 900
900
#2F483C
oklch(37.7% 0.037 163.2)
-
Step 950
950
#1C2A23
oklch(27% 0.023 162.6)
#66917C 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) | #908B7B | 0.057 |
| Deuteranopia (no green cones) | #88867D | 0.053 |
| Tritanopia (no blue cones) | #5D918B | 0.023 |
| Achromatopsia (no color) | #888888 | 0.058 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66917C
#66917C
oklch(61.9% 0.057 163)
- #9F788F
#9F788F
oklch(61.8% 0.058 342.8)
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 #66917C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate Green #658D6D ΔE 0.022
- Green Grey #77926F ΔE 0.027
- Dusty Teal #4C9085 ΔE 0.029
- Grey Teal #5E9B8A ΔE 0.029
- Dull Teal #5F9E8F ΔE 0.039
- Sea #3C9992 ΔE 0.044
- Ocean Green #3D9973 ΔE 0.049
- Persian Green #2A9D8F ΔE 0.053
Use #66917C 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.