#509DC5
Closest named color: Faded Blue (#658CBB). oklch(66.3% 0.096 233.5), rgb(80, 157, 197).
Aa
Black text reads best on this color (6.97:1).
About this color
#509DC5 is a medium-light, moderately saturated blue. In OKLCH its lightness is 66%, its chroma 0.096 and its hue 233°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.047 away. Black text reads best on it, at 6.97:1.
| Hue family | Blues |
| Lightness | medium-light (66%) |
| Chroma | moderately saturated (0.096) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.97:1 |
| White text | 3.01:1 |
Values
| HEX | #509DC5 |
| RGB | rgb(80, 157, 197) |
| HSL | hsl(201, 50%, 54%) |
| OKLCH | oklch(66.3% 0.096 233.5) |
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 #509DC5 | 3.01:1 | AA large text | Lc -62.0 | Content text, not long reading |
| Black text on #509DC5 | 6.97:1 | AA | Lc 47.4 | Large or bold text, headings |
| #509DC5 text on white | 3.01:1 | AA large text | Lc 56.6 | Large or bold text, headings |
| #509DC5 text on black | 6.97:1 | AA | Lc -45.1 | 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
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E1ECF2
oklch(93.7% 0.014 231.2)
-
Step 200
200
#C9DDE8
oklch(88.6% 0.026 231.7)
-
Step 300
300
#A3C6DB
oklch(80.8% 0.048 234.5)
-
Step 400
400
#70A9C9
oklch(70.7% 0.076 233.9)
-
Step 500
500 (this color)
#509DC5
oklch(66.3% 0.096 233.5)
-
Step 600
600
#207DA7
oklch(55.7% 0.105 233.4)
-
Step 700
700
#0F698F
oklch(49.1% 0.097 233.5)
-
Step 800
800
#125674
oklch(42.8% 0.081 233)
-
Step 900
900
#19475E
oklch(37.8% 0.063 233.8)
-
Step 950
950
#102A37
oklch(27.1% 0.04 232.6)
#509DC5 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) | #8A9BC7 | 0.063 |
| Deuteranopia (no green cones) | #798FC4 | 0.054 |
| Tritanopia (no blue cones) | #00A8AA | 0.069 |
| Achromatopsia (no color) | #959595 | 0.097 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #509DC5
#509DC5
oklch(66.3% 0.096 233.5)
- #C28259
#C28259
oklch(66.3% 0.097 53)
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 #509DC5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.047
- Greyblue #77A1B5 ΔE 0.048
- Cadet Blue #5F9EA0 ΔE 0.058
- Silver Lake Blue #778DA9 ΔE 0.060
- Turquoise Blue #06B1C4 ΔE 0.061
- Blue Grey #758DA3 ΔE 0.063
- Dusty Blue #5A86AD ΔE 0.065
- Bluegrey #85A3B2 ΔE 0.067
Use #509DC5 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.