#509AEB
Closest named color: Chefchaouen Blue (#4895EF). oklch(67.5% 0.142 252.5), rgb(80, 154, 235).
Aa
Black text reads best on this color (7.16:1).
About this color
#509AEB is a medium-light, vivid blue. In OKLCH its lightness is 68%, its chroma 0.142 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.018 away. Black text reads best on it, at 7.16:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | vivid (0.142) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 7.16:1 |
| White text | 2.93:1 |
Values
| HEX | #509AEB |
| RGB | rgb(80, 154, 235) |
| HSL | hsl(211, 79%, 62%) |
| OKLCH | oklch(67.5% 0.142 252.5) |
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 #509AEB | 2.93:1 | Fails | Lc -60.8 | Content text, not long reading |
| Black text on #509AEB | 7.16:1 | AAA | Lc 48.6 | Large or bold text, headings |
| #509AEB text on white | 2.93:1 | Fails | Lc 55.5 | Large or bold text, headings |
| #509AEB text on black | 7.16:1 | AAA | Lc -46.3 | 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
#F0F6FD
oklch(97.1% 0.011 252.1)
-
Step 100
100
#DEEBFB
oklch(93.5% 0.026 253.6)
-
Step 200
200
#C3DCFA
oklch(88.6% 0.049 253.1)
-
Step 300
300
#97C5F9
oklch(81% 0.089 252)
-
Step 400
400 (this color)
#509AEB
oklch(67.5% 0.142 252.5)
-
Step 500
500
#1B8AF2
oklch(63% 0.181 252.6)
-
Step 600
600
#0074D2
oklch(55.7% 0.168 252.4)
-
Step 700
700
#0061B2
oklch(49.2% 0.149 252.5)
-
Step 800
800
#004F93
oklch(42.7% 0.13 252.6)
-
Step 900
900
#00427C
oklch(37.8% 0.114 252.4)
-
Step 950
950
#052749
oklch(27% 0.074 252.3)
#509AEB 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) | #769FEE | 0.042 |
| Deuteranopia (no green cones) | #6090E9 | 0.028 |
| Tritanopia (no blue cones) | #00ADB7 | 0.112 |
| Achromatopsia (no color) | #979797 | 0.142 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #509AEB
#509AEB
oklch(67.5% 0.142 252.5)
- #CB860D
#CB860D
oklch(67.4% 0.142 72.3)
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 #509AEB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.018
- Cornflower Blue #6495ED ΔE 0.022
- Dark Sky Blue #448EE4 ΔE 0.036
- Soft Blue #6488EA ΔE 0.048
- Dodger Blue #1E90FF ΔE 0.054
- Faded Blue #658CBB ΔE 0.073
- Periwinkle Blue #8F99FB ΔE 0.075
- Perrywinkle #8F8CE7 ΔE 0.075
Use #509AEB 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.