#509BD5
Closest named color: Chefchaouen Blue (#4895EF). oklch(66.6% 0.114 244.1), rgb(80, 155, 213).
Aa
Black text reads best on this color (6.99:1).
About this color
#509BD5 is a medium-light, moderately saturated blue. In OKLCH its lightness is 67%, its chroma 0.114 and its hue 244°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.046 away. Black text reads best on it, at 6.99:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.114) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 6.99:1 |
| White text | 3.00:1 |
Values
| HEX | #509BD5 |
| RGB | rgb(80, 155, 213) |
| HSL | hsl(206, 61%, 57%) |
| OKLCH | oklch(66.6% 0.114 244.1) |
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 #509BD5 | 3.00:1 | AA large text | Lc -61.9 | Content text, not long reading |
| Black text on #509BD5 | 6.99:1 | AA | Lc 47.5 | Large or bold text, headings |
| #509BD5 text on white | 3.00:1 | AA large text | Lc 56.5 | Large or bold text, headings |
| #509BD5 text on black | 6.99:1 | AA | Lc -45.3 | 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 500.
-
Step 50
50
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E1EBF4
oklch(93.5% 0.016 245.1)
-
Step 200
200
#C9DCED
oklch(88.6% 0.031 245.1)
-
Step 300
300
#A3C5E3
oklch(80.9% 0.056 245.2)
-
Step 400
400
#6FA7D5
oklch(70.7% 0.09 244.3)
-
Step 500
500 (this color)
#509BD5
oklch(66.6% 0.114 244.1)
-
Step 600
600
#1F79B6
oklch(55.5% 0.124 244.1)
-
Step 700
700
#0F669D
oklch(49.2% 0.116 244)
-
Step 800
800
#12537F
oklch(42.6% 0.096 244.2)
-
Step 900
900
#184566
oklch(37.6% 0.075 244.1)
-
Step 950
950
#10293C
oklch(27.1% 0.047 243.8)
#509BD5 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) | #819CD8 | 0.053 |
| Deuteranopia (no green cones) | #6F8FD4 | 0.042 |
| Tritanopia (no blue cones) | #00A9AF | 0.087 |
| Achromatopsia (no color) | #959595 | 0.114 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #509BD5
#509BD5
oklch(66.6% 0.114 244.1)
- #C48442
#C48442
oklch(66.6% 0.114 64.4)
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 #509BD5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.046
- Cornflower Blue #6495ED ΔE 0.047
- Dark Sky Blue #448EE4 ΔE 0.049
- Faded Blue #658CBB ΔE 0.050
- Greyblue #77A1B5 ΔE 0.067
- Soft Blue #6488EA ΔE 0.068
- Cool Blue #4984B8 ΔE 0.072
- Water Blue #0E87CC ΔE 0.073
Use #509BD5 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.