#509BBD
Closest named color: Faded Blue (#658CBB). oklch(65.5% 0.09 229.8), rgb(80, 155, 189).
Aa
Black text reads best on this color (6.76:1).
About this color
#509BBD is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 65%, its chroma 0.090 and its hue 230°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.044 away. Black text reads best on it, at 6.76:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (65%) |
| Chroma | moderately saturated (0.090) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.76:1 |
| White text | 3.10:1 |
Values
| HEX | #509BBD |
| RGB | rgb(80, 155, 189) |
| HSL | hsl(199, 45%, 53%) |
| OKLCH | oklch(65.5% 0.09 229.8) |
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 #509BBD | 3.10:1 | AA large text | Lc -63.2 | Content text, not long reading |
| Black text on #509BBD | 6.76:1 | AA | Lc 46.2 | Large or bold text, headings |
| #509BBD text on white | 3.10:1 | AA large text | Lc 57.8 | Large or bold text, headings |
| #509BBD text on black | 6.76:1 | AA | Lc -43.9 | 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
#E2ECF1
oklch(93.7% 0.013 228.9)
-
Step 200
200
#CADDE6
oklch(88.6% 0.024 227.8)
-
Step 300
300
#A4C7D8
oklch(81% 0.044 228.9)
-
Step 400
400
#71A9C4
oklch(70.6% 0.071 229.8)
-
Step 500
500 (this color)
#509BBD
oklch(65.5% 0.09 229.8)
-
Step 600
600
#247DA1
oklch(55.5% 0.098 229.9)
-
Step 700
700
#146A8A
oklch(49.2% 0.091 229.3)
-
Step 800
800
#165670
oklch(42.6% 0.075 230)
-
Step 900
900
#1A475B
oklch(37.6% 0.059 230.5)
-
Step 950
950
#112A35
oklch(27.1% 0.037 229)
#509BBD 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) | #8A99BF | 0.064 |
| Deuteranopia (no green cones) | #7A8DBD | 0.056 |
| Tritanopia (no blue cones) | #00A5A6 | 0.063 |
| Achromatopsia (no color) | #929292 | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #509BBD
#509BBD
oklch(65.5% 0.09 229.8)
- #BD805E
#BD805E
oklch(65.4% 0.09 49.8)
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 #509BBD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.044
- Greyblue #77A1B5 ΔE 0.047
- Cadet Blue #5F9EA0 ΔE 0.048
- Silver Lake Blue #778DA9 ΔE 0.053
- Blue Grey #758DA3 ΔE 0.055
- Dusty Blue #5A86AD ΔE 0.058
- Turquoise Blue #06B1C4 ΔE 0.063
- Off Blue #5684AE ΔE 0.064
Use #509BBD 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.