#517F89
Closest named color: Grey Blue (#647D8E). oklch(56.7% 0.052 212.9), rgb(81, 127, 137).
Aa
Black text reads best on this color (4.74:1).
About this color
#517F89 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 57%, its chroma 0.052 and its hue 213°. Its hue sits on the cool side of the wheel. The nearest named color is Grey Blue (#647D8E), ΔE 0.025 away. Black text reads best on it, at 4.74:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (57%) |
| Chroma | muted (0.052) |
| Temperature | cool |
| Nearest name | Grey Blue (#647D8E) |
| Black text | 4.74:1 |
| White text | 4.42:1 |
Values
| HEX | #517F89 |
| RGB | rgb(81, 127, 137) |
| HSL | hsl(191, 26%, 43%) |
| OKLCH | oklch(56.7% 0.052 212.9) |
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 #517F89 | 4.42:1 | AA large text | Lc -76.1 | Fine for body text |
| Black text on #517F89 | 4.74:1 | AA | Lc 33.5 | Non-text elements, placeholder text |
| #517F89 text on white | 4.42:1 | AA large text | Lc 70.6 | Content text, not long reading |
| #517F89 text on black | 4.74:1 | AA | Lc -31.1 | 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
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E5EBEC
oklch(93.6% 0.007 208.8)
-
Step 200
200
#D0DCDE
oklch(88.6% 0.013 208.8)
-
Step 300
300
#B0C5CA
oklch(80.9% 0.024 213.6)
-
Step 400
400
#86A7AF
oklch(70.6% 0.038 214.1)
-
Step 500
500
#67929B
oklch(63.2% 0.049 212.1)
-
Step 600
600 (this color)
#517F89
oklch(56.7% 0.052 212.9)
-
Step 700
700
#3E6871
oklch(49% 0.049 212.8)
-
Step 800
800
#34555C
oklch(42.7% 0.04 212.5)
-
Step 900
900
#2E464C
oklch(37.7% 0.031 215.1)
-
Step 950
950
#1B292C
oklch(27% 0.02 212.4)
#517F89 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) | #777C8A | 0.049 |
| Deuteranopia (no green cones) | #6E7589 | 0.044 |
| Tritanopia (no blue cones) | #3A8382 | 0.029 |
| Achromatopsia (no color) | #787878 | 0.053 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #517F89
#517F89
oklch(56.7% 0.052 212.9)
- #936C63
#936C63
oklch(56.8% 0.052 33.4)
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 #517F89, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grey Blue #647D8E ΔE 0.025
- Battleship Grey #6B7C85 ΔE 0.031
- Stormy Blue #507B9C ΔE 0.036
- Cerulean #457B9D ΔE 0.039
- Steel Grey #6F828A ΔE 0.039
- Metallic Blue #4F738E ΔE 0.040
- Battleship Gray #6C757D ΔE 0.041
- Slate Gray #708090 ΔE 0.041
Use #517F89 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.