#509EAE
Closest named color: Cadet Blue (#5F9EA0). oklch(65.6% 0.08 212.7), rgb(80, 158, 174).
Aa
Black text reads best on this color (6.84:1).
About this color
#509EAE is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 66%, its chroma 0.080 and its hue 213°. Its hue sits on the cool side of the wheel. The nearest named color is Cadet Blue (#5F9EA0), ΔE 0.024 away. Black text reads best on it, at 6.84:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (66%) |
| Chroma | moderately saturated (0.080) |
| Temperature | cool |
| Nearest name | Cadet Blue (#5F9EA0) |
| Black text | 6.84:1 |
| White text | 3.06:1 |
Values
| HEX | #509EAE |
| RGB | rgb(80, 158, 174) |
| HSL | hsl(190, 37%, 50%) |
| OKLCH | oklch(65.6% 0.08 212.7) |
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 #509EAE | 3.06:1 | AA large text | Lc -62.8 | Content text, not long reading |
| Black text on #509EAE | 6.84:1 | AA | Lc 46.7 | Large or bold text, headings |
| #509EAE text on white | 3.06:1 | AA large text | Lc 57.4 | Large or bold text, headings |
| #509EAE text on black | 6.84:1 | AA | Lc -44.4 | 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
#E2ECEE
oklch(93.6% 0.011 211)
-
Step 200
200
#CADDE2
oklch(88.5% 0.022 215.3)
-
Step 300
300
#A5C8D0
oklch(81% 0.039 213.1)
-
Step 400
400
#72ABB8
oklch(70.7% 0.062 213.6)
-
Step 500
500 (this color)
#509EAE
oklch(65.6% 0.08 212.7)
-
Step 600
600
#238091
oklch(55.5% 0.087 212.8)
-
Step 700
700
#126C7C
oklch(49% 0.081 213.4)
-
Step 800
800
#155865
oklch(42.6% 0.067 213.8)
-
Step 900
900
#1A4952
oklch(37.7% 0.052 212.3)
-
Step 950
950
#112B30
oklch(27.1% 0.033 211.7)
#509EAE 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) | #9299AF | 0.075 |
| Deuteranopia (no green cones) | #838EAE | 0.068 |
| Tritanopia (no blue cones) | #00A5A3 | 0.045 |
| Achromatopsia (no color) | #939393 | 0.080 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #509EAE
#509EAE
oklch(65.6% 0.08 212.7)
- #BD7F72
#BD7F72
oklch(65.7% 0.08 32.3)
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 #509EAE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cadet Blue #5F9EA0 ΔE 0.024
- Greyblue #77A1B5 ΔE 0.043
- Dull Teal #5F9E8F ΔE 0.047
- Sea #3C9992 ΔE 0.047
- Grey Teal #5E9B8A ΔE 0.052
- Blue Grey #758DA3 ΔE 0.055
- Turquoise Blue #06B1C4 ΔE 0.056
- Persian Green #2A9D8F ΔE 0.057
Use #509EAE 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.