#509FBE
Closest named color: Greyblue (#77A1B5). oklch(66.5% 0.09 226.2), rgb(80, 159, 190).
Aa
Black text reads best on this color (7.04:1).
About this color
#509FBE is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 66%, its chroma 0.090 and its hue 226°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.041 away. Black text reads best on it, at 7.04:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (66%) |
| Chroma | moderately saturated (0.090) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 7.04:1 |
| White text | 2.98:1 |
Values
| HEX | #509FBE |
| RGB | rgb(80, 159, 190) |
| HSL | hsl(197, 46%, 53%) |
| OKLCH | oklch(66.5% 0.09 226.2) |
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 #509FBE | 2.98:1 | Fails | Lc -61.6 | Content text, not long reading |
| Black text on #509FBE | 7.04:1 | AAA | Lc 47.8 | Large or bold text, headings |
| #509FBE text on white | 2.98:1 | Fails | Lc 56.2 | Large or bold text, headings |
| #509FBE text on black | 7.04:1 | 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E1ECF0
oklch(93.6% 0.013 221.4)
-
Step 200
200
#C9DDE6
oklch(88.5% 0.025 226.5)
-
Step 300
300
#A3C7D7
oklch(80.9% 0.045 226.7)
-
Step 400
400
#70AAC2
oklch(70.7% 0.07 226)
-
Step 500
500 (this color)
#509FBE
oklch(66.5% 0.09 226.2)
-
Step 600
600
#1E7E9F
oklch(55.5% 0.098 226.6)
-
Step 700
700
#0C6B88
oklch(49.2% 0.091 225.7)
-
Step 800
800
#11576E
oklch(42.7% 0.075 225.6)
-
Step 900
900
#184859
oklch(37.7% 0.058 225.1)
-
Step 950
950
#102A34
oklch(27% 0.037 225.8)
#509FBE 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) | #8E9CC0 | 0.068 |
| Deuteranopia (no green cones) | #7F90BE | 0.061 |
| Tritanopia (no blue cones) | #00A8A9 | 0.058 |
| Achromatopsia (no color) | #959595 | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #509FBE
#509FBE
oklch(66.5% 0.09 226.2)
- #C28264
#C28264
oklch(66.5% 0.09 45.8)
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 #509FBE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.041
- Cadet Blue #5F9EA0 ΔE 0.045
- Turquoise Blue #06B1C4 ΔE 0.053
- Faded Blue #658CBB ΔE 0.054
- Silver Lake Blue #778DA9 ΔE 0.059
- Bluegrey #85A3B2 ΔE 0.060
- Blue Grey #758DA3 ΔE 0.061
- Bluey Grey #89A0B0 ΔE 0.063
Use #509FBE 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.