#517F83
Closest named color: Grey Blue (#647D8E). oklch(56.5% 0.051 202.8), rgb(81, 127, 131).
Aa
Black text reads best on this color (4.71:1).
About this color
#517F83 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 56%, its chroma 0.051 and its hue 203°. Its hue sits on the cool side of the wheel. The nearest named color is Grey Blue (#647D8E), ΔE 0.031 away. Black text reads best on it, at 4.71:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (56%) |
| Chroma | muted (0.051) |
| Temperature | cool |
| Nearest name | Grey Blue (#647D8E) |
| Black text | 4.71:1 |
| White text | 4.45:1 |
Values
| HEX | #517F83 |
| RGB | rgb(81, 127, 131) |
| HSL | hsl(185, 24%, 42%) |
| OKLCH | oklch(56.5% 0.051 202.8) |
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 #517F83 | 4.45:1 | AA large text | Lc -76.3 | Fine for body text |
| Black text on #517F83 | 4.71:1 | AA | Lc 33.2 | Non-text elements, placeholder text |
| #517F83 text on white | 4.45:1 | AA large text | Lc 70.9 | Content text, not long reading |
| #517F83 text on black | 4.71:1 | AA | Lc -30.8 | 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
#E5EBEC
oklch(93.6% 0.007 208.8)
-
Step 200
200
#D0DCDD
oklch(88.6% 0.013 202.9)
-
Step 300
300
#B0C5C7
oklch(80.8% 0.023 203.7)
-
Step 400
400
#87A8AB
oklch(70.8% 0.036 203.2)
-
Step 500
500
#689296
oklch(63.1% 0.046 203.5)
-
Step 600
600 (this color)
#517F83
oklch(56.5% 0.051 202.8)
-
Step 700
700
#3F696C
oklch(49.1% 0.047 201.6)
-
Step 800
800
#345558
oklch(42.5% 0.039 203.1)
-
Step 900
900
#2E4749
oklch(37.8% 0.031 202.3)
-
Step 950
950
#1B292B
oklch(26.9% 0.019 207.1)
#517F83 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) | #787B83 | 0.050 |
| Deuteranopia (no green cones) | #707583 | 0.047 |
| Tritanopia (no blue cones) | #3D8280 | 0.022 |
| Achromatopsia (no color) | #777777 | 0.051 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #517F83
#517F83
oklch(56.5% 0.051 202.8)
- #926A68
#926A68
oklch(56.4% 0.052 22.1)
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 #517F83, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grey Blue #647D8E ΔE 0.031
- Battleship Grey #6B7C85 ΔE 0.033
- Battleship Gray #6C757D ΔE 0.041
- Steel Grey #6F828A ΔE 0.041
- Stormy Blue #507B9C ΔE 0.045
- Metallic Blue #4F738E ΔE 0.045
- Slate Gray #708090 ΔE 0.046
- Cerulean #457B9D ΔE 0.047
Use #517F83 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.