#517AE7
Closest named color: Cornflower (#6A79F7). oklch(60.6% 0.171 266), rgb(81, 122, 231).
Aa
Black text reads best on this color (5.28:1).
About this color
#517AE7 is a medium-dark, vivid blue. In OKLCH its lightness is 61%, its chroma 0.171 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower (#6A79F7), ΔE 0.039 away. Black text reads best on it, at 5.28:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | vivid (0.171) |
| Temperature | cool |
| Nearest name | Cornflower (#6A79F7) |
| Black text | 5.28:1 |
| White text | 3.97:1 |
Values
| HEX | #517AE7 |
| RGB | rgb(81, 122, 231) |
| HSL | hsl(224, 76%, 61%) |
| OKLCH | oklch(60.6% 0.171 266) |
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 #517AE7 | 3.97:1 | AA large text | Lc -72.3 | Content text, not long reading |
| Black text on #517AE7 | 5.28:1 | AA | Lc 37.3 | Non-text elements, placeholder text |
| #517AE7 text on white | 3.97:1 | AA large text | Lc 66.7 | Content text, not long reading |
| #517AE7 text on black | 5.28:1 | AA | Lc -34.9 | 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 500.
-
Step 50
50
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E2EAFB
oklch(93.6% 0.025 265.6)
-
Step 200
200
#CBD9F9
oklch(88.5% 0.047 266.7)
-
Step 300
300
#A7C0F8
oklch(80.9% 0.084 265.9)
-
Step 400
400
#799DF4
oklch(70.7% 0.134 266)
-
Step 500
500 (this color)
#517AE7
oklch(60.6% 0.171 266)
-
Step 600
600
#3F68DE
oklch(55.5% 0.186 266)
-
Step 700
700
#3256C1
oklch(49.1% 0.173 266.1)
-
Step 800
800
#29479C
oklch(42.7% 0.143 265.9)
-
Step 900
900
#253D7C
oklch(37.8% 0.111 265.7)
-
Step 950
950
#162449
oklch(27% 0.071 266.2)
#517AE7 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) | #4287EB | 0.033 |
| Deuteranopia (no green cones) | #2179E5 | 0.037 |
| Tritanopia (no blue cones) | #0093A5 | 0.142 |
| Achromatopsia (no color) | #808080 | 0.171 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #517AE7
#517AE7
oklch(60.6% 0.171 266)
- #A37B00
#A37B00
oklch(60.6% 0.124 85.7)
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 #517AE7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower #6A79F7 ΔE 0.039
- Soft Blue #6488EA ΔE 0.045
- Clear Blue #247AFD ΔE 0.046
- Royal Blue #4169E1 ΔE 0.049
- Dark Sky Blue #448EE4 ΔE 0.053
- Cerulean Blue #056EEE ΔE 0.061
- Dodger Blue #1E90FF ΔE 0.064
- Medium Slate Blue #7B68EE ΔE 0.066
Use #517AE7 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.