#517BFB
Closest named color: Cornflower (#6A79F7). oklch(62.1% 0.196 266.9), rgb(81, 123, 251).
Aa
Black text reads best on this color (5.57:1).
About this color
#517BFB is a medium-light, vivid blue. In OKLCH its lightness is 62%, its chroma 0.196 and its hue 267°. 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 5.57:1.
| Hue family | Blues |
| Lightness | medium-light (62%) |
| Chroma | vivid (0.196) |
| Temperature | cool |
| Nearest name | Cornflower (#6A79F7) |
| Black text | 5.57:1 |
| White text | 3.76:1 |
Values
| HEX | #517BFB |
| RGB | rgb(81, 123, 251) |
| HSL | hsl(225, 96%, 65%) |
| OKLCH | oklch(62.1% 0.196 266.9) |
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 #517BFB | 3.76:1 | AA large text | Lc -70.3 | Content text, not long reading |
| Black text on #517BFB | 5.57:1 | AA | Lc 39.3 | Non-text elements, placeholder text |
| #517BFB text on white | 3.76:1 | AA large text | Lc 64.8 | Content text, not long reading |
| #517BFB text on black | 5.57:1 | 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
#A5BFFF
oklch(80.9% 0.095 267.2)
-
Step 400
400
#769BFF
oklch(70.7% 0.152 267.2)
-
Step 500
500 (this color)
#517BFB
oklch(62.1% 0.196 266.9)
-
Step 600
600
#3B63EE
oklch(55.6% 0.214 266.8)
-
Step 700
700
#2F51CF
oklch(49.2% 0.198 267)
-
Step 800
800
#2743A7
oklch(42.7% 0.164 267)
-
Step 900
900
#233A84
oklch(37.6% 0.128 267)
-
Step 950
950
#14234E
oklch(27.1% 0.082 266.5)
#517BFB 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) | #2A8CFF | 0.046 |
| Deuteranopia (no green cones) | #007CF8 | 0.044 |
| Tritanopia (no blue cones) | #0099AF | 0.160 |
| Achromatopsia (no color) | #838383 | 0.197 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #517BFB
#517BFB
oklch(62.1% 0.196 266.9)
- #A78000
#A78000
oklch(62% 0.127 87.1)
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 #517BFB, closest first.
No curated palette has a color within ΔE 0.04 of #517BFB.
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 0.034
- Soft Blue #6488EA ΔE 0.051
- Dodger Blue #1E90FF ΔE 0.056
- Royal Blue #4169E1 ΔE 0.062
- Dark Sky Blue #448EE4 ΔE 0.064
- Cerulean Blue #056EEE ΔE 0.065
- Medium Slate Blue #7B68EE ΔE 0.065
Use #517BFB 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.