#509DA7
Closest named color: Cadet Blue (#5F9EA0). oklch(65.1% 0.077 206.6), rgb(80, 157, 167).
Aa
Black text reads best on this color (6.72:1).
About this color
#509DA7 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 65%, its chroma 0.077 and its hue 207°. Its hue sits on the cool side of the wheel. The nearest named color is Cadet Blue (#5F9EA0), ΔE 0.017 away. Black text reads best on it, at 6.72:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (65%) |
| Chroma | moderately saturated (0.077) |
| Temperature | cool |
| Nearest name | Cadet Blue (#5F9EA0) |
| Black text | 6.72:1 |
| White text | 3.12:1 |
Values
| HEX | #509DA7 |
| RGB | rgb(80, 157, 167) |
| HSL | hsl(187, 35%, 48%) |
| OKLCH | oklch(65.1% 0.077 206.6) |
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 #509DA7 | 3.12:1 | AA large text | Lc -63.5 | Content text, not long reading |
| Black text on #509DA7 | 6.72:1 | AA | Lc 46.0 | Large or bold text, headings |
| #509DA7 text on white | 3.12:1 | AA large text | Lc 58.1 | Large or bold text, headings |
| #509DA7 text on black | 6.72:1 | AA | Lc -43.6 | 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
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E2ECED
oklch(93.6% 0.011 204.1)
-
Step 200
200
#CADDE0
oklch(88.4% 0.021 208.1)
-
Step 300
300
#A5C8CD
oklch(80.9% 0.038 207)
-
Step 400
400
#73ACB3
oklch(70.8% 0.06 205.6)
-
Step 500
500 (this color)
#509DA7
oklch(65.1% 0.077 206.6)
-
Step 600
600
#26818C
oklch(55.6% 0.084 206.8)
-
Step 700
700
#166D77
oklch(49.1% 0.078 206.8)
-
Step 800
800
#175961
oklch(42.8% 0.065 206.9)
-
Step 900
900
#1B494F
oklch(37.7% 0.05 207)
-
Step 950
950
#112B2E
oklch(27% 0.032 205.4)
#509DA7 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) | #9298A8 | 0.075 |
| Deuteranopia (no green cones) | #848DA7 | 0.070 |
| Tritanopia (no blue cones) | #11A3A0 | 0.039 |
| Achromatopsia (no color) | #929292 | 0.078 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #509DA7
#509DA7
oklch(65.1% 0.077 206.6)
- #BA7D76
#BA7D76
oklch(65% 0.077 26.6)
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 #509DA7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cadet Blue #5F9EA0 ΔE 0.017
- Sea #3C9992 ΔE 0.038
- Dull Teal #5F9E8F ΔE 0.038
- Grey Teal #5E9B8A ΔE 0.042
- Persian Green #2A9D8F ΔE 0.048
- Greyblue #77A1B5 ΔE 0.049
- Blue Grey #758DA3 ΔE 0.055
- Blue Green #0F9B8E ΔE 0.055
Use #509DA7 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.