#517CF8
Closest named color: Cornflower (#6A79F7). oklch(62.1% 0.191 266.5), rgb(81, 124, 248).
Aa
Black text reads best on this color (5.58:1).
About this color
#517CF8 is a medium-light, vivid blue. In OKLCH its lightness is 62%, its chroma 0.191 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower (#6A79F7), ΔE 0.028 away. Black text reads best on it, at 5.58:1.
| Hue family | Blues |
| Lightness | medium-light (62%) |
| Chroma | vivid (0.191) |
| Temperature | cool |
| Nearest name | Cornflower (#6A79F7) |
| Black text | 5.58:1 |
| White text | 3.75:1 |
Values
| HEX | #517CF8 |
| RGB | rgb(81, 124, 248) |
| HSL | hsl(225, 92%, 65%) |
| OKLCH | oklch(62.1% 0.191 266.5) |
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 #517CF8 | 3.75:1 | AA large text | Lc -70.2 | Content text, not long reading |
| Black text on #517CF8 | 5.58:1 | AA | Lc 39.3 | Non-text elements, placeholder text |
| #517CF8 text on white | 3.75:1 | AA large text | Lc 64.7 | Content text, not long reading |
| #517CF8 text on black | 5.58:1 | AA | Lc -36.9 | 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
#F1F5FE
oklch(97% 0.013 266.7)
-
Step 100
100
#E1EAFD
oklch(93.6% 0.028 265.4)
-
Step 200
200
#C9D9FD
oklch(88.5% 0.053 266.4)
-
Step 300
300
#A5BFFE
oklch(80.8% 0.094 267)
-
Step 400
400
#759CFE
oklch(70.8% 0.15 266.3)
-
Step 500
500 (this color)
#517CF8
oklch(62.1% 0.191 266.5)
-
Step 600
600
#3B64EB
oklch(55.5% 0.209 266.5)
-
Step 700
700
#2E52CC
oklch(49% 0.193 266.5)
-
Step 800
800
#2644A5
oklch(42.6% 0.16 266.4)
-
Step 900
900
#233B83
oklch(37.8% 0.125 266.5)
-
Step 950
950
#14234D
oklch(27% 0.08 266.3)
#517CF8 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) | #328CFC | 0.042 |
| Deuteranopia (no green cones) | #007CF5 | 0.044 |
| Tritanopia (no blue cones) | #0099AE | 0.156 |
| Achromatopsia (no color) | #848484 | 0.191 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #517CF8
#517CF8
oklch(62.1% 0.191 266.5)
- #A88000
#A88000
oklch(62.2% 0.127 86.5)
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 #517CF8, closest first.
No curated palette has a color within ΔE 0.04 of #517CF8.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower #6A79F7 ΔE 0.028
- Clear Blue #247AFD ΔE 0.035
- Soft Blue #6488EA ΔE 0.046
- Dodger Blue #1E90FF ΔE 0.054
- Dark Sky Blue #448EE4 ΔE 0.059
- Royal Blue #4169E1 ΔE 0.061
- Cerulean Blue #056EEE ΔE 0.065
- Medium Slate Blue #7B68EE ΔE 0.066
Use #517CF8 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.