#509591
Closest named color: Sea (#3C9992). oklch(62.3% 0.07 190.6), rgb(80, 149, 145).
Aa
Black text reads best on this color (6.04:1).
About this color
#509591 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 62%, its chroma 0.070 and its hue 191°. Its hue sits on the cool side of the wheel. The nearest named color is Sea (#3C9992), ΔE 0.018 away. Black text reads best on it, at 6.04:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (62%) |
| Chroma | moderately saturated (0.070) |
| Temperature | cool |
| Nearest name | Sea (#3C9992) |
| Black text | 6.04:1 |
| White text | 3.47:1 |
Values
| HEX | #509591 |
| RGB | rgb(80, 149, 145) |
| HSL | hsl(177, 30%, 45%) |
| OKLCH | oklch(62.3% 0.07 190.6) |
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 #509591 | 3.47:1 | AA large text | Lc -67.6 | Content text, not long reading |
| Black text on #509591 | 6.04:1 | AA | Lc 41.9 | Non-text elements, placeholder text |
| #509591 text on white | 3.47:1 | AA large text | Lc 62.1 | Content text, not long reading |
| #509591 text on black | 6.04:1 | AA | Lc -39.6 | 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
#F2F6F6
oklch(97% 0.004 197.1)
-
Step 100
100
#E3ECEB
oklch(93.6% 0.01 189.1)
-
Step 200
200
#CCDDDC
oklch(88.4% 0.018 192.6)
-
Step 300
300
#A8C8C6
oklch(80.9% 0.034 191.8)
-
Step 400
400
#78ACA8
oklch(70.7% 0.055 190)
-
Step 500
500 (this color)
#509591
oklch(62.3% 0.07 190.6)
-
Step 600
600
#33827E
oklch(55.7% 0.077 190.6)
-
Step 700
700
#246E6A
oklch(49.2% 0.072 190)
-
Step 800
800
#205956
oklch(42.6% 0.059 190.4)
-
Step 900
900
#214947
oklch(37.6% 0.045 191.1)
-
Step 950
950
#142B2A
oklch(27% 0.029 191.9)
#509591 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) | #8E8F91 | 0.074 |
| Deuteranopia (no green cones) | #828692 | 0.070 |
| Tritanopia (no blue cones) | #2E9894 | 0.024 |
| Achromatopsia (no color) | #8A8A8A | 0.071 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #509591
#509591
oklch(62.3% 0.07 190.6)
- #AD767D
#AD767D
oklch(62.4% 0.07 10.9)
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 #509591, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea #3C9992 ΔE 0.018
- Dusty Teal #4C9085 ΔE 0.021
- Grey Teal #5E9B8A ΔE 0.028
- Dull Teal #5F9E8F ΔE 0.033
- Persian Green #2A9D8F ΔE 0.034
- Cadet Blue #5F9EA0 ΔE 0.036
- Blue Green #0F9B8E ΔE 0.038
- Teal Green #0A9396 ΔE 0.038
Use #509591 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.