#509CD2
Closest named color: Faded Blue (#658CBB). oklch(66.7% 0.11 241.9), rgb(80, 156, 210).
Aa
Black text reads best on this color (7.02:1).
About this color
#509CD2 is a medium-light, moderately saturated blue. In OKLCH its lightness is 67%, its chroma 0.110 and its hue 242°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.049 away. Black text reads best on it, at 7.02:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.110) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 7.02:1 |
| White text | 2.98:1 |
Values
| HEX | #509CD2 |
| RGB | rgb(80, 156, 210) |
| HSL | hsl(205, 59%, 57%) |
| OKLCH | oklch(66.7% 0.11 241.9) |
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 #509CD2 | 2.98:1 | Fails | Lc -61.7 | Content text, not long reading |
| Black text on #509CD2 | 7.02:1 | AAA | Lc 47.7 | Large or bold text, headings |
| #509CD2 text on white | 2.98:1 | Fails | Lc 56.3 | Large or bold text, headings |
| #509CD2 text on black | 7.02:1 | AAA | Lc -45.5 | 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
#C9DCEC
oklch(88.5% 0.03 243.4)
-
Step 300
300
#A3C6E1
oklch(81% 0.054 241.5)
-
Step 400
400
#6FA7D2
oklch(70.6% 0.086 242.5)
-
Step 500
500 (this color)
#509CD2
oklch(66.7% 0.11 241.9)
-
Step 600
600
#1E7AB3
oklch(55.6% 0.12 242)
-
Step 700
700
#0D679A
oklch(49.2% 0.111 241.6)
-
Step 800
800
#12547D
oklch(42.8% 0.092 242)
-
Step 900
900
#184664
oklch(37.8% 0.071 241.1)
-
Step 950
950
#10293B
oklch(27.1% 0.046 242.4)
#509CD2 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) | #849CD4 | 0.056 |
| Deuteranopia (no green cones) | #728FD1 | 0.046 |
| Tritanopia (no blue cones) | #00A9AF | 0.081 |
| Achromatopsia (no color) | #959595 | 0.110 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #509CD2
#509CD2
oklch(66.7% 0.11 241.9)
- #C48448
#C48448
oklch(66.7% 0.11 62.2)
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 #509CD2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.049
- Chefchaouen Blue #4895EF ΔE 0.052
- Cornflower Blue #6495ED ΔE 0.053
- Dark Sky Blue #448EE4 ΔE 0.054
- Greyblue #77A1B5 ΔE 0.062
- Silver Lake Blue #778DA9 ΔE 0.070
- Dusty Blue #5A86AD ΔE 0.072
- Cool Blue #4984B8 ΔE 0.072
Use #509CD2 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.