#509BC3
Closest named color: Faded Blue (#658CBB). oklch(65.8% 0.095 234.1), rgb(80, 155, 195).
Aa
Black text reads best on this color (6.81:1).
About this color
#509BC3 is a medium-light, moderately saturated blue. In OKLCH its lightness is 66%, its chroma 0.095 and its hue 234°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.043 away. Black text reads best on it, at 6.81:1.
| Hue family | Blues |
| Lightness | medium-light (66%) |
| Chroma | moderately saturated (0.095) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.81:1 |
| White text | 3.08:1 |
Values
| HEX | #509BC3 |
| RGB | rgb(80, 155, 195) |
| HSL | hsl(201, 49%, 54%) |
| OKLCH | oklch(65.8% 0.095 234.1) |
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 #509BC3 | 3.08:1 | AA large text | Lc -62.9 | Content text, not long reading |
| Black text on #509BC3 | 6.81:1 | AA | Lc 46.5 | Large or bold text, headings |
| #509BC3 text on white | 3.08:1 | AA large text | Lc 57.5 | Large or bold text, headings |
| #509BC3 text on black | 6.81:1 | AA | Lc -44.2 | Non-text elements, placeholder text |
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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E2ECF2
oklch(93.7% 0.013 233.7)
-
Step 200
200
#C9DCE8
oklch(88.4% 0.026 235.4)
-
Step 300
300
#A4C6DB
oklch(80.9% 0.047 235.3)
-
Step 400
400
#71A9C8
oklch(70.8% 0.074 233.5)
-
Step 500
500 (this color)
#509BC3
oklch(65.8% 0.095 234.1)
-
Step 600
600
#237CA7
oklch(55.5% 0.104 234.8)
-
Step 700
700
#13698F
oklch(49.2% 0.097 234)
-
Step 800
800
#155674
oklch(42.8% 0.08 233.6)
-
Step 900
900
#1A475E
oklch(37.8% 0.063 234.2)
-
Step 950
950
#112A37
oklch(27.2% 0.039 233.4)
#509BC3 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) | #889AC5 | 0.061 |
| Deuteranopia (no green cones) | #788EC2 | 0.052 |
| Tritanopia (no blue cones) | #00A6A8 | 0.069 |
| Achromatopsia (no color) | #939393 | 0.096 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #509BC3
#509BC3
oklch(65.8% 0.095 234.1)
- #BF8158
#BF8158
oklch(65.7% 0.095 53.8)
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 #509BC3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.043
- Greyblue #77A1B5 ΔE 0.050
- Silver Lake Blue #778DA9 ΔE 0.056
- Cadet Blue #5F9EA0 ΔE 0.057
- Blue Grey #758DA3 ΔE 0.060
- Dusty Blue #5A86AD ΔE 0.060
- Off Blue #5684AE ΔE 0.065
- Turquoise Blue #06B1C4 ΔE 0.065
Use #509BC3 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.