#517CF5
Closest named color: Cornflower (#6A79F7). oklch(61.9% 0.187 266.3), rgb(81, 124, 245).
Aa
Black text reads best on this color (5.55:1).
About this color
#517CF5 is a medium-dark, vivid blue. In OKLCH its lightness is 62%, its chroma 0.187 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower (#6A79F7), ΔE 0.029 away. Black text reads best on it, at 5.55:1.
| Hue family | Blues |
| Lightness | medium-dark (62%) |
| Chroma | vivid (0.187) |
| Temperature | cool |
| Nearest name | Cornflower (#6A79F7) |
| Black text | 5.55:1 |
| White text | 3.78:1 |
Values
| HEX | #517CF5 |
| RGB | rgb(81, 124, 245) |
| HSL | hsl(224, 89%, 64%) |
| OKLCH | oklch(61.9% 0.187 266.3) |
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 #517CF5 | 3.78:1 | AA large text | Lc -70.5 | Content text, not long reading |
| Black text on #517CF5 | 5.55:1 | AA | Lc 39.1 | Non-text elements, placeholder text |
| #517CF5 text on white | 3.78:1 | AA large text | Lc 65.0 | Content text, not long reading |
| #517CF5 text on black | 5.55:1 | AA | Lc -36.7 | 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E2EAFC
oklch(93.6% 0.026 266.6)
-
Step 200
200
#CAD9FC
oklch(88.5% 0.051 267)
-
Step 300
300
#A5C0FD
oklch(81% 0.092 265.9)
-
Step 400
400
#769CFC
oklch(70.7% 0.147 266.4)
-
Step 500
500 (this color)
#517CF5
oklch(61.9% 0.187 266.3)
-
Step 600
600
#3C65E8
oklch(55.5% 0.204 266.5)
-
Step 700
700
#2F53CA
oklch(49.1% 0.189 266.4)
-
Step 800
800
#2745A3
oklch(42.7% 0.156 266.3)
-
Step 900
900
#233B81
oklch(37.6% 0.122 266.3)
-
Step 950
950
#15234C
oklch(27% 0.078 266.9)
#517CF5 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) | #378BF9 | 0.039 |
| Deuteranopia (no green cones) | #007CF3 | 0.044 |
| Tritanopia (no blue cones) | #0098AD | 0.153 |
| Achromatopsia (no color) | #838383 | 0.187 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #517CF5
#517CF5
oklch(61.9% 0.187 266.3)
- #A77F00
#A77F00
oklch(61.8% 0.127 86.3)
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 #517CF5, closest first.
No curated palette has a color within ΔE 0.04 of #517CF5.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower #6A79F7 ΔE 0.029
- Clear Blue #247AFD ΔE 0.036
- Soft Blue #6488EA ΔE 0.044
- Dodger Blue #1E90FF ΔE 0.054
- Dark Sky Blue #448EE4 ΔE 0.057
- Royal Blue #4169E1 ΔE 0.059
- Cerulean Blue #056EEE ΔE 0.064
- Medium Slate Blue #7B68EE ΔE 0.066
Use #517CF5 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.