#518181
Closest named color: Battleship Grey (#6B7C85). oklch(56.9% 0.052 195.8), rgb(81, 129, 129).
Aa
Black text reads best on this color (4.80:1).
About this color
#518181 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 57%, its chroma 0.052 and its hue 196°. Its hue sits on the cool side of the wheel. The nearest named color is Battleship Grey (#6B7C85), ΔE 0.036 away. Black text reads best on it, at 4.80:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (57%) |
| Chroma | muted (0.052) |
| Temperature | cool |
| Nearest name | Battleship Grey (#6B7C85) |
| Black text | 4.80:1 |
| White text | 4.36:1 |
Values
| HEX | #518181 |
| RGB | rgb(81, 129, 129) |
| HSL | hsl(180, 23%, 41%) |
| OKLCH | oklch(56.9% 0.052 195.8) |
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 #518181 | 4.36:1 | AA large text | Lc -75.7 | Fine for body text |
| Black text on #518181 | 4.80:1 | AA | Lc 33.9 | Non-text elements, placeholder text |
| #518181 text on white | 4.36:1 | AA large text | Lc 70.2 | Content text, not long reading |
| #518181 text on black | 4.80:1 | AA | Lc -31.5 | 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 600.
-
Step 50
50
#F3F6F6
oklch(97.1% 0.003 197.1)
-
Step 100
100
#E5EBEB
oklch(93.6% 0.006 197)
-
Step 200
200
#D0DCDC
oklch(88.5% 0.013 196.9)
-
Step 300
300
#B0C6C5
oklch(81% 0.024 193.4)
-
Step 400
400
#86A8A8
oklch(70.6% 0.037 196.3)
-
Step 500
500
#679393
oklch(63.1% 0.048 196)
-
Step 600
600 (this color)
#518181
oklch(56.9% 0.052 195.8)
-
Step 700
700
#3E696A
oklch(49% 0.048 197.6)
-
Step 800
800
#335656
oklch(42.7% 0.041 195.7)
-
Step 900
900
#2D4747
oklch(37.7% 0.032 195.9)
-
Step 950
950
#1B2A2A
oklch(27.2% 0.02 196)
#518181 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) | #7B7D81 | 0.054 |
| Deuteranopia (no green cones) | #727681 | 0.050 |
| Tritanopia (no blue cones) | #3D8481 | 0.020 |
| Achromatopsia (no color) | #797979 | 0.053 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #518181
#518181
oklch(56.9% 0.052 195.8)
- #936B6D
#936B6D
oklch(56.9% 0.051 15.5)
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 #518181, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Battleship Grey #6B7C85 ΔE 0.036
- Grey Blue #647D8E ΔE 0.036
- Steel Grey #6F828A ΔE 0.041
- Dusty Teal #4C9085 ΔE 0.044
- Battleship Gray #6C757D ΔE 0.045
- Dark Cyan #008B8B ΔE 0.047
- Slate Gray #708090 ΔE 0.048
- Teal #008080 ΔE 0.048
Use #518181 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.