#509EC0
Closest named color: Greyblue (#77A1B5). oklch(66.3% 0.092 228.9), rgb(80, 158, 192).
Aa
Black text reads best on this color (6.99:1).
About this color
#509EC0 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 66%, its chroma 0.092 and its hue 229°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.044 away. Black text reads best on it, at 6.99:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (66%) |
| Chroma | moderately saturated (0.092) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 6.99:1 |
| White text | 3.00:1 |
Values
| HEX | #509EC0 |
| RGB | rgb(80, 158, 192) |
| HSL | hsl(198, 47%, 53%) |
| OKLCH | oklch(66.3% 0.092 228.9) |
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 #509EC0 | 3.00:1 | AA large text | Lc -61.9 | Content text, not long reading |
| Black text on #509EC0 | 6.99:1 | AA | Lc 47.5 | Large or bold text, headings |
| #509EC0 text on white | 3.00:1 | AA large text | Lc 56.5 | Large or bold text, headings |
| #509EC0 text on black | 6.99:1 | AA | Lc -45.2 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E1ECF1
oklch(93.6% 0.014 226.6)
-
Step 200
200
#C9DDE6
oklch(88.5% 0.025 226.5)
-
Step 300
300
#A3C7D8
oklch(80.9% 0.045 228.2)
-
Step 400
400
#70AAC4
oklch(70.8% 0.071 228)
-
Step 500
500 (this color)
#509EC0
oklch(66.3% 0.092 228.9)
-
Step 600
600
#1F7EA2
oklch(55.7% 0.1 229)
-
Step 700
700
#0E6A8A
oklch(49.1% 0.092 228.6)
-
Step 800
800
#125770
oklch(42.8% 0.076 227.9)
-
Step 900
900
#19475B
oklch(37.6% 0.06 230.1)
-
Step 950
950
#102A35
oklch(27% 0.038 228.2)
#509EC0 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) | #8C9CC2 | 0.066 |
| Deuteranopia (no green cones) | #7D90C0 | 0.058 |
| Tritanopia (no blue cones) | #00A8A9 | 0.062 |
| Achromatopsia (no color) | #959595 | 0.092 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #509EC0
#509EC0
oklch(66.3% 0.092 228.9)
- #C18260
#C18260
oklch(66.3% 0.092 49)
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 #509EC0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.044
- Cadet Blue #5F9EA0 ΔE 0.049
- Faded Blue #658CBB ΔE 0.051
- Turquoise Blue #06B1C4 ΔE 0.057
- Silver Lake Blue #778DA9 ΔE 0.059
- Blue Grey #758DA3 ΔE 0.061
- Bluegrey #85A3B2 ΔE 0.062
- Bluey Grey #89A0B0 ΔE 0.065
Use #509EC0 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.