#509DF3
Closest named color: Chefchaouen Blue (#4895EF). oklch(68.6% 0.149 253), rgb(80, 157, 243).
Aa
Black text reads best on this color (7.45:1).
About this color
#509DF3 is a medium-light, vivid blue. In OKLCH its lightness is 69%, its chroma 0.149 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.024 away. Black text reads best on it, at 7.45:1.
| Hue family | Blues |
| Lightness | medium-light (69%) |
| Chroma | vivid (0.149) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 7.45:1 |
| White text | 2.81:1 |
Values
| HEX | #509DF3 |
| RGB | rgb(80, 157, 243) |
| HSL | hsl(212, 87%, 63%) |
| OKLCH | oklch(68.6% 0.149 253) |
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 #509DF3 | 2.81:1 | Fails | Lc -59.1 | Large or bold text, headings |
| Black text on #509DF3 | 7.45:1 | AAA | Lc 50.2 | Large or bold text, headings |
| #509DF3 text on white | 2.81:1 | Fails | Lc 53.8 | Large or bold text, headings |
| #509DF3 text on black | 7.45:1 | AAA | Lc -48.0 | Large or bold text, headings |
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 400.
-
Step 50
50
#F0F6FE
oklch(97.1% 0.012 255.5)
-
Step 100
100
#DEEBFC
oklch(93.5% 0.027 255.1)
-
Step 200
200
#C2DCFB
oklch(88.5% 0.051 252.9)
-
Step 300
300
#96C4FC
oklch(80.8% 0.094 253.7)
-
Step 400
400 (this color)
#509DF3
oklch(68.6% 0.149 253)
-
Step 500
500
#0E89F7
oklch(63% 0.19 253)
-
Step 600
600
#0073D3
oklch(55.6% 0.171 252.9)
-
Step 700
700
#0060B3
oklch(49% 0.152 253.2)
-
Step 800
800
#004F94
oklch(42.8% 0.131 252.8)
-
Step 900
900
#00417D
oklch(37.6% 0.117 253.3)
-
Step 950
950
#03274B
oklch(27.1% 0.078 252.5)
#509DF3 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) | #77A2F7 | 0.043 |
| Deuteranopia (no green cones) | #5F93F1 | 0.027 |
| Tritanopia (no blue cones) | #00B1BC | 0.117 |
| Achromatopsia (no color) | #9A9A9A | 0.149 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #509DF3
#509DF3
oklch(68.6% 0.149 253)
- #D08900
#D08900
oklch(68.6% 0.146 72.7)
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 #509DF3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.024
- Cornflower Blue #6495ED ΔE 0.025
- Dark Sky Blue #448EE4 ΔE 0.046
- Dodger Blue #1E90FF ΔE 0.054
- Soft Blue #6488EA ΔE 0.054
- Periwinkle Blue #8F99FB ΔE 0.070
- Perrywinkle #8F8CE7 ΔE 0.076
- Lavender Blue #8B88F8 ΔE 0.080
Use #509DF3 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.