#517B95
Closest named color: Stormy Blue (#507B9C). oklch(56.2% 0.062 236.6), rgb(81, 123, 149).
Aa
Black text reads best on this color (4.61:1).
About this color
#517B95 is a medium-dark, muted blue. In OKLCH its lightness is 56%, its chroma 0.062 and its hue 237°. Its hue sits on the cool side of the wheel. The nearest named color is Stormy Blue (#507B9C), ΔE 0.011 away. Black text reads best on it, at 4.61:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | muted (0.062) |
| Temperature | cool |
| Nearest name | Stormy Blue (#507B9C) |
| Black text | 4.61:1 |
| White text | 4.54:1 |
Values
| HEX | #517B95 |
| RGB | rgb(81, 123, 149) |
| HSL | hsl(203, 30%, 45%) |
| OKLCH | oklch(56.2% 0.062 236.6) |
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 #517B95 | 4.54:1 | AA | Lc -77.0 | Fine for body text |
| Black text on #517B95 | 4.61:1 | AA | Lc 32.6 | Non-text elements, placeholder text |
| #517B95 text on white | 4.54:1 | AA | Lc 71.5 | Content text, not long reading |
| #517B95 text on black | 4.61:1 | AA | Lc -30.2 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E5EBEF
oklch(93.7% 0.008 236.6)
-
Step 200
200
#D0DBE2
oklch(88.5% 0.015 235.4)
-
Step 300
300
#B0C4D1
oklch(80.9% 0.029 236.3)
-
Step 400
400
#87A5B9
oklch(70.6% 0.044 237.4)
-
Step 500
500
#688FA8
oklch(63.1% 0.057 237)
-
Step 600
600 (this color)
#517B95
oklch(56.2% 0.062 236.6)
-
Step 700
700
#40667D
oklch(49.1% 0.057 236.2)
-
Step 800
800
#355366
oklch(42.7% 0.048 237.2)
-
Step 900
900
#2E4553
oklch(37.7% 0.037 235.8)
-
Step 950
950
#1B2831
oklch(26.9% 0.025 239.1)
#517B95 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) | #6F7A96 | 0.038 |
| Deuteranopia (no green cones) | #667395 | 0.033 |
| Tritanopia (no blue cones) | #348283 | 0.049 |
| Achromatopsia (no color) | #767676 | 0.062 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #517B95
#517B95
oklch(56.2% 0.062 236.6)
- #916C51
#916C51
oklch(56.2% 0.062 57.2)
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 #517B95, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Stormy Blue #507B9C ΔE 0.011
- Cerulean #457B9D ΔE 0.017
- Metallic Blue #4F738E ΔE 0.024
- Dull Blue #49759C ΔE 0.026
- Grey Blue #647D8E ΔE 0.026
- Battleship Grey #6B7C85 ΔE 0.040
- Off Blue #5684AE ΔE 0.043
- Slate Gray #708090 ΔE 0.044
Use #517B95 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.