#517CFF
Closest named color: Cornflower (#6A79F7). oklch(62.6% 0.2 266.8), rgb(81, 124, 255).
Aa
Black text reads best on this color (5.67:1).
About this color
#517CFF is a medium-light, vivid blue. In OKLCH its lightness is 63%, its chroma 0.200 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower (#6A79F7), ΔE 0.030 away. Black text reads best on it, at 5.67:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | vivid (0.200) |
| Temperature | cool |
| Nearest name | Cornflower (#6A79F7) |
| Black text | 5.67:1 |
| White text | 3.69:1 |
Values
| HEX | #517CFF |
| RGB | rgb(81, 124, 255) |
| HSL | hsl(225, 100%, 66%) |
| OKLCH | oklch(62.6% 0.2 266.8) |
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 #517CFF | 3.69:1 | AA large text | Lc -69.6 | Content text, not long reading |
| Black text on #517CFF | 5.67:1 | AA | Lc 39.9 | Non-text elements, placeholder text |
| #517CFF text on white | 3.69:1 | AA large text | Lc 64.2 | Content text, not long reading |
| #517CFF text on black | 5.67:1 | AA | Lc -37.5 | 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
#F1F5FF
oklch(97% 0.014 268.5)
-
Step 100
100
#E1EAFE
oklch(93.6% 0.029 266.4)
-
Step 200
200
#C9D9FE
oklch(88.5% 0.054 266.8)
-
Step 300
300
#A5BFFF
oklch(80.9% 0.095 267.2)
-
Step 400
400
#759BFF
oklch(70.6% 0.153 266.8)
-
Step 500
500 (this color)
#517CFF
oklch(62.6% 0.2 266.8)
-
Step 600
600
#3A62F0
oklch(55.5% 0.218 266.9)
-
Step 700
700
#2D50D1
oklch(49.1% 0.202 266.7)
-
Step 800
800
#2643A9
oklch(42.8% 0.167 266.8)
-
Step 900
900
#223A86
oklch(37.8% 0.131 266.7)
-
Step 950
950
#14234E
oklch(27.1% 0.082 266.5)
#517CFF 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) | #268DFF | 0.047 |
| Deuteranopia (no green cones) | #007DFC | 0.043 |
| Tritanopia (no blue cones) | #009BB2 | 0.162 |
| Achromatopsia (no color) | #858585 | 0.201 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #517CFF
#517CFF
oklch(62.6% 0.2 266.8)
- #A98100
#A98100
oklch(62.5% 0.128 86.7)
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 #517CFF, closest first.
No curated palette has a color within ΔE 0.04 of #517CFF.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower #6A79F7 ΔE 0.030
- Clear Blue #247AFD ΔE 0.035
- Soft Blue #6488EA ΔE 0.052
- Dodger Blue #1E90FF ΔE 0.054
- Dark Sky Blue #448EE4 ΔE 0.066
- Royal Blue #4169E1 ΔE 0.067
- Medium Slate Blue #7B68EE ΔE 0.068
- Cerulean Blue #056EEE ΔE 0.068
Use #517CFF 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.