#509E87
Closest named color: Grey Teal (#5E9B8A). oklch(64.3% 0.085 172), rgb(80, 158, 135).
Aa
Black text reads best on this color (6.58:1).
About this color
#509E87 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 64%, its chroma 0.085 and its hue 172°. Its hue sits on the cool side of the wheel. The nearest named color is Grey Teal (#5E9B8A), ΔE 0.017 away. Black text reads best on it, at 6.58:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.085) |
| Temperature | cool |
| Nearest name | Grey Teal (#5E9B8A) |
| Black text | 6.58:1 |
| White text | 3.19:1 |
Values
| HEX | #509E87 |
| RGB | rgb(80, 158, 135) |
| HSL | hsl(162, 33%, 47%) |
| OKLCH | oklch(64.3% 0.085 172) |
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 #509E87 | 3.19:1 | AA large text | Lc -64.3 | Content text, not long reading |
| Black text on #509E87 | 6.58:1 | AA | Lc 45.1 | Large or bold text, headings |
| #509E87 text on white | 3.19:1 | AA large text | Lc 58.9 | Large or bold text, headings |
| #509E87 text on black | 6.58:1 | AA | Lc -42.8 | 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
#E2EDE9
oklch(93.7% 0.013 172.4)
-
Step 200
200
#CBDED7
oklch(88.4% 0.022 171.7)
-
Step 300
300
#A6CABD
oklch(80.9% 0.043 171.3)
-
Step 400
400
#74AF9C
oklch(70.8% 0.068 172.1)
-
Step 500
500 (this color)
#509E87
oklch(64.3% 0.085 172)
-
Step 600
600
#29856D
oklch(55.7% 0.093 171.9)
-
Step 700
700
#1A705B
oklch(49% 0.086 172.3)
-
Step 800
800
#1A5C4A
oklch(42.8% 0.072 171.1)
-
Step 900
900
#1D4B3E
oklch(37.7% 0.055 172)
-
Step 950
950
#122C24
oklch(27% 0.036 171.2)
#509E87 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) | #9A9586 | 0.089 |
| Deuteranopia (no green cones) | #8E8C89 | 0.086 |
| Tritanopia (no blue cones) | #319F97 | 0.028 |
| Achromatopsia (no color) | #909090 | 0.086 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #509E87
#509E87
oklch(64.3% 0.085 172)
- #B67792
#B67792
oklch(64.3% 0.086 352.5)
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 #509E87, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grey Teal #5E9B8A ΔE 0.017
- Dull Teal #5F9E8F ΔE 0.020
- Persian Green #2A9D8F ΔE 0.027
- Sea #3C9992 ΔE 0.030
- Ocean Green #3D9973 ΔE 0.036
- Blue Green #0F9B8E ΔE 0.037
- Dusty Teal #4C9085 ΔE 0.042
- Cadet Blue #5F9EA0 ΔE 0.042
Use #509E87 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.