#51665B
Closest named color: Slate (#516572). oklch(49% 0.031 162.2), rgb(81, 102, 91).
Aa
White text reads best on this color (6.17:1).
About this color
#51665B is a medium-dark, muted green. In OKLCH its lightness is 49%, its chroma 0.031 and its hue 162°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Slate (#516572), ΔE 0.038 away. White text reads best on it, at 6.17:1.
| Hue family | Greens |
| Lightness | medium-dark (49%) |
| Chroma | muted (0.031) |
| Temperature | in between |
| Nearest name | Slate (#516572) |
| Black text | 3.40:1 |
| White text | 6.17:1 |
Values
| HEX | #51665B |
| RGB | rgb(81, 102, 91) |
| HSL | hsl(149, 11%, 36%) |
| OKLCH | oklch(49% 0.031 162.2) |
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 #51665B | 6.17:1 | AA | Lc -86.0 | Fine for body text |
| Black text on #51665B | 3.40:1 | AA large text | Lc 23.3 | Dividers and decoration only |
| #51665B text on white | 6.17:1 | AA | Lc 80.8 | Fine for body text |
| #51665B text on black | 3.40:1 | AA large text | Lc -21.1 | Dividers and decoration only |
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 700.
-
Step 50
50
#F4F6F5
oklch(97.1% 0.002 165.1)
-
Step 100
100
#E7EBE9
oklch(93.6% 0.005 165)
-
Step 200
200
#D5DBD7
oklch(88.6% 0.008 157.1)
-
Step 300
300
#B9C4BE
oklch(81% 0.015 162.4)
-
Step 400
400
#94A59C
oklch(70.6% 0.023 162.8)
-
Step 500
500
#7A9084
oklch(63.2% 0.031 161.6)
-
Step 600
600
#627A6D
oklch(55.6% 0.034 161.4)
-
Step 700
700 (this color)
#51665B
oklch(49% 0.031 162.2)
-
Step 800
800
#43544B
oklch(42.8% 0.026 162)
-
Step 900
900
#38453E
oklch(37.6% 0.021 161.7)
-
Step 950
950
#212825
oklch(26.9% 0.011 167.8)
#51665B 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) | #65635A | 0.030 |
| Deuteranopia (no green cones) | #61605C | 0.029 |
| Tritanopia (no blue cones) | #4D6663 | 0.013 |
| Achromatopsia (no color) | #616161 | 0.031 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51665B
#51665B
oklch(49% 0.031 162.2)
- #6D5A65
#6D5A65
oklch(49% 0.03 342.6)
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 #51665B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.038
- Dim Gray #696969 ΔE 0.044
- Dark Green Blue #1F6357 ΔE 0.055
- Dark Aqua #05696B ΔE 0.059
- Dark Moss Green #606C38 ΔE 0.060
- Dark Aquamarine #017371 ΔE 0.063
- Deep Turquoise #017374 ΔE 0.064
- Dark Olive Green #556B2F ΔE 0.067
Use #51665B 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.