#509EDD
Closest named color: Chefchaouen Blue (#4895EF). oklch(67.7% 0.121 245.4), rgb(80, 158, 221).
Aa
Black text reads best on this color (7.27:1).
About this color
#509EDD is a medium-light, moderately saturated blue. In OKLCH its lightness is 68%, its chroma 0.121 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.041 away. Black text reads best on it, at 7.27:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | moderately saturated (0.121) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 7.27:1 |
| White text | 2.88:1 |
Values
| HEX | #509EDD |
| RGB | rgb(80, 158, 221) |
| HSL | hsl(207, 67%, 59%) |
| OKLCH | oklch(67.7% 0.121 245.4) |
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 #509EDD | 2.88:1 | Fails | Lc -60.2 | Content text, not long reading |
| Black text on #509EDD | 7.27:1 | AAA | Lc 49.2 | Large or bold text, headings |
| #509EDD text on white | 2.88:1 | Fails | Lc 54.9 | Large or bold text, headings |
| #509EDD text on black | 7.27:1 | AAA | Lc -46.9 | 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
#DEECF8
oklch(93.6% 0.022 243.8)
-
Step 200
200
#C3DDF4
oklch(88.6% 0.042 245)
-
Step 300
300
#98C6EF
oklch(80.8% 0.076 245.8)
-
Step 400
400 (this color)
#509EDD
oklch(67.7% 0.121 245.4)
-
Step 500
500
#1390E0
oklch(63.2% 0.155 245.2)
-
Step 600
600
#0079C0
oklch(55.7% 0.141 245.3)
-
Step 700
700
#0065A2
oklch(49% 0.125 245.5)
-
Step 800
800
#005386
oklch(42.8% 0.108 245.3)
-
Step 900
900
#004570
oklch(37.7% 0.095 244.9)
-
Step 950
950
#042943
oklch(27.1% 0.063 244.6)
#509EDD 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) | #82A0E0 | 0.053 |
| Deuteranopia (no green cones) | #6F92DC | 0.041 |
| Tritanopia (no blue cones) | #00ADB4 | 0.092 |
| Achromatopsia (no color) | #989898 | 0.121 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #509EDD
#509EDD
oklch(67.7% 0.121 245.4)
- #CA863D
#CA863D
oklch(67.6% 0.121 64.9)
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 #509EDD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.041
- Cornflower Blue #6495ED ΔE 0.042
- Dark Sky Blue #448EE4 ΔE 0.050
- Faded Blue #658CBB ΔE 0.062
- Soft Blue #6488EA ΔE 0.067
- Greyblue #77A1B5 ΔE 0.071
- Dodger Blue #1E90FF ΔE 0.076
- Turquoise Blue #06B1C4 ΔE 0.079
Use #509EDD 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.