#509CF8
Closest named color: Chefchaouen Blue (#4895EF). oklch(68.7% 0.156 254.6), rgb(80, 156, 248).
Aa
Black text reads best on this color (7.45:1).
About this color
#509CF8 is a medium-light, vivid blue. In OKLCH its lightness is 69%, its chroma 0.156 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.023 away. Black text reads best on it, at 7.45:1.
| Hue family | Blues |
| Lightness | medium-light (69%) |
| Chroma | vivid (0.156) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 7.45:1 |
| White text | 2.81:1 |
Values
| HEX | #509CF8 |
| RGB | rgb(80, 156, 248) |
| HSL | hsl(213, 92%, 64%) |
| OKLCH | oklch(68.7% 0.156 254.6) |
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 #509CF8 | 2.81:1 | Fails | Lc -59.1 | Large or bold text, headings |
| Black text on #509CF8 | 7.45:1 | AAA | Lc 50.2 | Large or bold text, headings |
| #509CF8 text on white | 2.81:1 | Fails | Lc 53.8 | Large or bold text, headings |
| #509CF8 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
#DEEBFD
oklch(93.6% 0.028 256.5)
-
Step 200
200
#C1DCFD
oklch(88.5% 0.054 253.6)
-
Step 300
300
#95C4FF
oklch(80.9% 0.098 254.5)
-
Step 400
400 (this color)
#509CF8
oklch(68.7% 0.156 254.6)
-
Step 500
500
#1087FD
oklch(63% 0.199 254.7)
-
Step 600
600
#0071D9
oklch(55.6% 0.181 254.6)
-
Step 700
700
#005FB8
oklch(49.1% 0.16 254.6)
-
Step 800
800
#004D98
oklch(42.6% 0.139 254.8)
-
Step 900
900
#004080
oklch(37.6% 0.123 254.7)
-
Step 950
950
#03264D
oklch(27% 0.082 254.4)
#509CF8 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) | #72A2FC | 0.039 |
| Deuteranopia (no green cones) | #5A93F6 | 0.023 |
| Tritanopia (no blue cones) | #00B1BE | 0.122 |
| Achromatopsia (no color) | #9A9A9A | 0.156 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #509CF8
#509CF8
oklch(68.7% 0.156 254.6)
- #CE8B00
#CE8B00
oklch(68.7% 0.145 74.9)
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 #509CF8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.023
- Cornflower Blue #6495ED ΔE 0.026
- Dark Sky Blue #448EE4 ΔE 0.047
- Dodger Blue #1E90FF ΔE 0.049
- Soft Blue #6488EA ΔE 0.053
- Periwinkle Blue #8F99FB ΔE 0.068
- Perrywinkle #8F8CE7 ΔE 0.076
- Lavender Blue #8B88F8 ΔE 0.077
Use #509CF8 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.