#509DA0
Closest named color: Cadet Blue (#5F9EA0). oklch(64.8% 0.076 198.8), rgb(80, 157, 160).
Aa
Black text reads best on this color (6.67:1).
About this color
#509DA0 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 65%, its chroma 0.076 and its hue 199°. Its hue sits on the cool side of the wheel. The nearest named color is Cadet Blue (#5F9EA0), ΔE 0.015 away. Black text reads best on it, at 6.67:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (65%) |
| Chroma | moderately saturated (0.076) |
| Temperature | cool |
| Nearest name | Cadet Blue (#5F9EA0) |
| Black text | 6.67:1 |
| White text | 3.14:1 |
Values
| HEX | #509DA0 |
| RGB | rgb(80, 157, 160) |
| HSL | hsl(182, 33%, 47%) |
| OKLCH | oklch(64.8% 0.076 198.8) |
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 #509DA0 | 3.14:1 | AA large text | Lc -63.8 | Content text, not long reading |
| Black text on #509DA0 | 6.67:1 | AA | Lc 45.7 | Large or bold text, headings |
| #509DA0 text on white | 3.14:1 | AA large text | Lc 58.4 | Large or bold text, headings |
| #509DA0 text on black | 6.67:1 | AA | Lc -43.3 | 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
#E2ECEC
oklch(93.6% 0.011 197)
-
Step 200
200
#CADEDE
oklch(88.6% 0.021 196.8)
-
Step 300
300
#A6C8CA
oklch(80.9% 0.036 200.9)
-
Step 400
400
#73ACAE
oklch(70.6% 0.059 198.7)
-
Step 500
500 (this color)
#509DA0
oklch(64.8% 0.076 198.8)
-
Step 600
600
#278285
oklch(55.6% 0.083 198.3)
-
Step 700
700
#176E71
oklch(49.2% 0.077 198.5)
-
Step 800
800
#18595C
oklch(42.6% 0.063 199.6)
-
Step 900
900
#1C4A4B
oklch(37.8% 0.05 197.2)
-
Step 950
950
#122B2C
oklch(27% 0.031 198.9)
#509DA0 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) | #9497A0 | 0.079 |
| Deuteranopia (no green cones) | #868DA1 | 0.073 |
| Tritanopia (no blue cones) | #1DA29E | 0.032 |
| Achromatopsia (no color) | #919191 | 0.077 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #509DA0
#509DA0
oklch(64.8% 0.076 198.8)
- #B97C7C
#B97C7C
oklch(64.9% 0.076 19.3)
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 #509DA0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cadet Blue #5F9EA0 ΔE 0.015
- Dull Teal #5F9E8F ΔE 0.028
- Sea #3C9992 ΔE 0.029
- Grey Teal #5E9B8A ΔE 0.032
- Persian Green #2A9D8F ΔE 0.039
- Blue Green #0F9B8E ΔE 0.047
- Dusty Teal #4C9085 ΔE 0.048
- Teal Green #0A9396 ΔE 0.052
Use #509DA0 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.