#517EA7
Closest named color: Stormy Blue (#507B9C). oklch(57.8% 0.081 247.1), rgb(81, 126, 167).
Aa
Black text reads best on this color (4.89:1).
About this color
#517EA7 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 58%, its chroma 0.081 and its hue 247°. Its hue sits on the cool side of the wheel. The nearest named color is Stormy Blue (#507B9C), ΔE 0.018 away. Black text reads best on it, at 4.89:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.081) |
| Temperature | cool |
| Nearest name | Stormy Blue (#507B9C) |
| Black text | 4.89:1 |
| White text | 4.29:1 |
Values
| HEX | #517EA7 |
| RGB | rgb(81, 126, 167) |
| HSL | hsl(209, 35%, 49%) |
| OKLCH | oklch(57.8% 0.081 247.1) |
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 #517EA7 | 4.29:1 | AA large text | Lc -75.1 | Fine for body text |
| Black text on #517EA7 | 4.89:1 | AA | Lc 34.5 | Non-text elements, placeholder text |
| #517EA7 text on white | 4.29:1 | AA large text | Lc 69.6 | Content text, not long reading |
| #517EA7 text on black | 4.89:1 | AA | Lc -32.1 | 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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E4EBF1
oklch(93.6% 0.011 243.7)
-
Step 200
200
#CFDBE6
oklch(88.6% 0.02 245.7)
-
Step 300
300
#AFC3D7
oklch(80.8% 0.036 248.3)
-
Step 400
400
#84A5C3
oklch(70.8% 0.057 246.2)
-
Step 500
500
#648EB4
oklch(63.1% 0.074 246.6)
-
Step 600
600 (this color)
#517EA7
oklch(57.8% 0.081 247.1)
-
Step 700
700
#3C6489
oklch(49% 0.075 247.8)
-
Step 800
800
#32526F
oklch(42.7% 0.061 247.1)
-
Step 900
900
#2C445A
oklch(37.7% 0.048 247.1)
-
Step 950
950
#1A2835
oklch(27% 0.031 247.2)
#517EA7 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) | #6D7FA9 | 0.035 |
| Deuteranopia (no green cones) | #6276A6 | 0.028 |
| Tritanopia (no blue cones) | #25888C | 0.069 |
| Achromatopsia (no color) | #7A7A7A | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #517EA7
#517EA7
oklch(57.8% 0.081 247.1)
- #9A7043
#9A7043
oklch(57.8% 0.081 66.9)
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 #517EA7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Stormy Blue #507B9C ΔE 0.018
- Off Blue #5684AE ΔE 0.020
- Steel Blue #4682B4 ΔE 0.022
- Cerulean #457B9D ΔE 0.022
- Dusty Blue #5A86AD ΔE 0.026
- Cool Blue #4984B8 ΔE 0.027
- Dull Blue #49759C ΔE 0.031
- Flat Blue #3C73A8 ΔE 0.041
Use #517EA7 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.