#509D8D
Closest named color: Grey Teal (#5E9B8A). oklch(64.2% 0.081 178.3), rgb(80, 157, 141).
Aa
Black text reads best on this color (6.54:1).
About this color
#509D8D is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 64%, its chroma 0.081 and its hue 178°. Its hue sits on the cool side of the wheel. The nearest named color is Grey Teal (#5E9B8A), ΔE 0.013 away. Black text reads best on it, at 6.54:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.081) |
| Temperature | cool |
| Nearest name | Grey Teal (#5E9B8A) |
| Black text | 6.54:1 |
| White text | 3.20:1 |
Values
| HEX | #509D8D |
| RGB | rgb(80, 157, 141) |
| HSL | hsl(168, 32%, 46%) |
| OKLCH | oklch(64.2% 0.081 178.3) |
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 #509D8D | 3.20:1 | AA large text | Lc -64.5 | Content text, not long reading |
| Black text on #509D8D | 6.54:1 | AA | Lc 44.9 | Non-text elements, placeholder text |
| #509D8D text on white | 3.20:1 | AA large text | Lc 59.1 | Large or bold text, headings |
| #509D8D text on black | 6.54:1 | AA | Lc -42.6 | 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
#F2F7F5
oklch(97.2% 0.006 170.4)
-
Step 100
100
#E2ECEA
oklch(93.5% 0.011 182.9)
-
Step 200
200
#CBDED9
oklch(88.5% 0.021 178.3)
-
Step 300
300
#A6C9C1
oklch(80.8% 0.039 179.9)
-
Step 400
400
#75AEA1
oklch(70.8% 0.063 178.5)
-
Step 500
500 (this color)
#509D8D
oklch(64.2% 0.081 178.3)
-
Step 600
600
#2A8474
oklch(55.6% 0.087 178.7)
-
Step 700
700
#1B7061
oklch(49.2% 0.082 178)
-
Step 800
800
#1A5B4F
oklch(42.7% 0.068 178.1)
-
Step 900
900
#1D4B42
oklch(37.8% 0.053 178.5)
-
Step 950
950
#122C26
oklch(27% 0.034 176.7)
#509D8D 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) | #98958C | 0.086 |
| Deuteranopia (no green cones) | #8B8C8E | 0.081 |
| Tritanopia (no blue cones) | #2E9F98 | 0.024 |
| Achromatopsia (no color) | #909090 | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #509D8D
#509D8D
oklch(64.2% 0.081 178.3)
- #B5788C
#B5788C
oklch(64.2% 0.08 358.4)
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 #509D8D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grey Teal #5E9B8A ΔE 0.013
- Dull Teal #5F9E8F ΔE 0.015
- Sea #3C9992 ΔE 0.023
- Persian Green #2A9D8F ΔE 0.025
- Cadet Blue #5F9EA0 ΔE 0.033
- Blue Green #0F9B8E ΔE 0.036
- Dusty Teal #4C9085 ΔE 0.038
- Ocean Green #3D9973 ΔE 0.043
Use #509D8D 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.