#509EDA
Closest named color: Chefchaouen Blue (#4895EF). oklch(67.5% 0.118 244.1), rgb(80, 158, 218).
Aa
Black text reads best on this color (7.24:1).
About this color
#509EDA is a medium-light, moderately saturated blue. In OKLCH its lightness is 68%, its chroma 0.118 and its hue 244°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.045 away. Black text reads best on it, at 7.24:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | moderately saturated (0.118) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 7.24:1 |
| White text | 2.89:1 |
Values
| HEX | #509EDA |
| RGB | rgb(80, 158, 218) |
| HSL | hsl(206, 65%, 58%) |
| OKLCH | oklch(67.5% 0.118 244.1) |
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 #509EDA | 2.89:1 | Fails | Lc -60.4 | Content text, not long reading |
| Black text on #509EDA | 7.24:1 | AAA | Lc 49.0 | Large or bold text, headings |
| #509EDA text on white | 2.89:1 | Fails | Lc 55.1 | Large or bold text, headings |
| #509EDA text on black | 7.24:1 | AAA | Lc -46.7 | 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
#F0F6FC
oklch(97% 0.01 247.9)
-
Step 100
100
#DEECF7
oklch(93.6% 0.021 241.4)
-
Step 200
200
#C3DDF3
oklch(88.5% 0.041 243.7)
-
Step 300
300
#98C7ED
oklch(81% 0.073 243.2)
-
Step 400
400 (this color)
#509EDA
oklch(67.5% 0.118 244.1)
-
Step 500
500
#1490DD
oklch(63% 0.151 244.3)
-
Step 600
600
#0079BD
oklch(55.5% 0.138 244.2)
-
Step 700
700
#0066A0
oklch(49.2% 0.121 244)
-
Step 800
800
#005384
oklch(42.6% 0.106 244.3)
-
Step 900
900
#00456F
oklch(37.6% 0.093 244.3)
-
Step 950
950
#042942
oklch(27% 0.061 243.6)
#509EDA 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) | #839FDD | 0.054 |
| Deuteranopia (no green cones) | #7192D9 | 0.043 |
| Tritanopia (no blue cones) | #00ADB3 | 0.089 |
| Achromatopsia (no color) | #989898 | 0.118 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #509EDA
#509EDA
oklch(67.5% 0.118 244.1)
- #C98641
#C98641
oklch(67.5% 0.118 64.1)
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 #509EDA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.045
- Cornflower Blue #6495ED ΔE 0.045
- Dark Sky Blue #448EE4 ΔE 0.052
- Faded Blue #658CBB ΔE 0.059
- Greyblue #77A1B5 ΔE 0.068
- Soft Blue #6488EA ΔE 0.070
- Turquoise Blue #06B1C4 ΔE 0.076
- Dodger Blue #1E90FF ΔE 0.080
Use #509EDA 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.