#509CB6
Closest named color: Cadet Blue (#5F9EA0). oklch(65.4% 0.084 222.8), rgb(80, 156, 182).
Aa
Black text reads best on this color (6.77:1).
About this color
#509CB6 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 65%, its chroma 0.084 and its hue 223°. Its hue sits on the cool side of the wheel. The nearest named color is Cadet Blue (#5F9EA0), ΔE 0.037 away. Black text reads best on it, at 6.77:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (65%) |
| Chroma | moderately saturated (0.084) |
| Temperature | cool |
| Nearest name | Cadet Blue (#5F9EA0) |
| Black text | 6.77:1 |
| White text | 3.10:1 |
Values
| HEX | #509CB6 |
| RGB | rgb(80, 156, 182) |
| HSL | hsl(195, 41%, 51%) |
| OKLCH | oklch(65.4% 0.084 222.8) |
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 #509CB6 | 3.10:1 | AA large text | Lc -63.2 | Content text, not long reading |
| Black text on #509CB6 | 6.77:1 | AA | Lc 46.3 | Large or bold text, headings |
| #509CB6 text on white | 3.10:1 | AA large text | Lc 57.8 | Large or bold text, headings |
| #509CB6 text on black | 6.77:1 | AA | Lc -43.9 | 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E2ECF0
oklch(93.7% 0.012 223.5)
-
Step 200
200
#CADDE4
oklch(88.5% 0.023 221.8)
-
Step 300
300
#A5C7D4
oklch(80.9% 0.041 223)
-
Step 400
400
#72AABF
oklch(70.7% 0.066 223.5)
-
Step 500
500 (this color)
#509CB6
oklch(65.4% 0.084 222.8)
-
Step 600
600
#247F9A
oklch(55.7% 0.092 222.3)
-
Step 700
700
#146B84
oklch(49.1% 0.086 222.9)
-
Step 800
800
#16576B
oklch(42.7% 0.071 223.1)
-
Step 900
900
#1B4857
oklch(37.7% 0.055 223.2)
-
Step 950
950
#112A33
oklch(26.9% 0.035 224)
#509CB6 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) | #8D99B7 | 0.068 |
| Deuteranopia (no green cones) | #7E8DB6 | 0.062 |
| Tritanopia (no blue cones) | #00A4A4 | 0.054 |
| Achromatopsia (no color) | #929292 | 0.085 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #509CB6
#509CB6
oklch(65.4% 0.084 222.8)
- #BD7F67
#BD7F67
oklch(65.4% 0.085 42)
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 #509CB6, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cadet Blue #5F9EA0 ΔE 0.037
- Greyblue #77A1B5 ΔE 0.044
- Faded Blue #658CBB ΔE 0.051
- Blue Grey #758DA3 ΔE 0.053
- Silver Lake Blue #778DA9 ΔE 0.053
- Sea #3C9992 ΔE 0.058
- Turquoise Blue #06B1C4 ΔE 0.060
- Dusty Blue #5A86AD ΔE 0.061
Use #509CB6 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.