#517A8A
Closest named color: Metallic Blue (#4F738E). oklch(55.5% 0.052 224.5), rgb(81, 122, 138).
Aa
White text reads best on this color (4.66:1).
About this color
#517A8A is a medium-dark, muted teal or cyan. In OKLCH its lightness is 56%, its chroma 0.052 and its hue 224°. Its hue sits on the cool side of the wheel. The nearest named color is Metallic Blue (#4F738E), ΔE 0.024 away. White text reads best on it, at 4.66:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (56%) |
| Chroma | muted (0.052) |
| Temperature | cool |
| Nearest name | Metallic Blue (#4F738E) |
| Black text | 4.50:1 |
| White text | 4.66:1 |
Values
| HEX | #517A8A |
| RGB | rgb(81, 122, 138) |
| HSL | hsl(197, 26%, 43%) |
| OKLCH | oklch(55.5% 0.052 224.5) |
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 #517A8A | 4.66:1 | AA | Lc -77.8 | Fine for body text |
| Black text on #517A8A | 4.50:1 | AA | Lc 31.7 | Non-text elements, placeholder text |
| #517A8A text on white | 4.66:1 | AA | Lc 72.3 | Content text, not long reading |
| #517A8A text on black | 4.50:1 | AA | Lc -29.3 | 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 600.
-
Step 50
50
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E5EBED
oklch(93.6% 0.007 219.6)
-
Step 200
200
#D1DBE0
oklch(88.5% 0.013 228.9)
-
Step 300
300
#B1C4CC
oklch(80.8% 0.024 224.9)
-
Step 400
400
#88A6B2
oklch(70.7% 0.037 224.1)
-
Step 500
500
#6A909F
oklch(63.1% 0.048 224.3)
-
Step 600
600 (this color)
#517A8A
oklch(55.5% 0.052 224.5)
-
Step 700
700
#426775
oklch(49.2% 0.048 223.9)
-
Step 800
800
#36545F
oklch(42.7% 0.04 223)
-
Step 900
900
#2F454E
oklch(37.6% 0.031 225.3)
-
Step 950
950
#1C292E
oklch(27.1% 0.02 223.6)
#517A8A 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) | #71788B | 0.041 |
| Deuteranopia (no green cones) | #68718A | 0.037 |
| Tritanopia (no blue cones) | #3A7F7F | 0.035 |
| Achromatopsia (no color) | #747474 | 0.052 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #517A8A
#517A8A
oklch(55.5% 0.052 224.5)
- #8E6A5A
#8E6A5A
oklch(55.6% 0.052 45.1)
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 #517A8A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Metallic Blue #4F738E ΔE 0.024
- Grey Blue #647D8E ΔE 0.027
- Stormy Blue #507B9C ΔE 0.028
- Cerulean #457B9D ΔE 0.031
- Battleship Grey #6B7C85 ΔE 0.034
- Battleship Gray #6C757D ΔE 0.037
- Dull Blue #49759C ΔE 0.037
- Slate Gray #708090 ΔE 0.046
Use #517A8A 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.