#509BAC
Closest named color: Cadet Blue (#5F9EA0). oklch(64.8% 0.078 214.4), rgb(80, 155, 172).
Aa
Black text reads best on this color (6.62:1).
About this color
#509BAC is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 65%, its chroma 0.078 and its hue 214°. Its hue sits on the cool side of the wheel. The nearest named color is Cadet Blue (#5F9EA0), ΔE 0.026 away. Black text reads best on it, at 6.62:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (65%) |
| Chroma | moderately saturated (0.078) |
| Temperature | cool |
| Nearest name | Cadet Blue (#5F9EA0) |
| Black text | 6.62:1 |
| White text | 3.16:1 |
Values
| HEX | #509BAC |
| RGB | rgb(80, 155, 172) |
| HSL | hsl(191, 37%, 49%) |
| OKLCH | oklch(64.8% 0.078 214.4) |
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 #509BAC | 3.16:1 | AA large text | Lc -64.1 | Content text, not long reading |
| Black text on #509BAC | 6.62:1 | AA | Lc 45.4 | Large or bold text, headings |
| #509BAC text on white | 3.16:1 | AA large text | Lc 58.7 | Large or bold text, headings |
| #509BAC text on black | 6.62:1 | AA | Lc -43.1 | 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
#73ABB8
oklch(70.7% 0.061 213.9)
-
Step 500
500 (this color)
#509BAC
oklch(64.8% 0.078 214.4)
-
Step 600
600
#278092
oklch(55.6% 0.085 214.2)
-
Step 700
700
#186C7C
oklch(49.1% 0.079 213.9)
-
Step 800
800
#185865
oklch(42.7% 0.066 214.3)
-
Step 900
900
#1C4952
oklch(37.8% 0.051 212.8)
-
Step 950
950
#122B30
oklch(27.1% 0.032 212.2)
#509BAC 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) | #8F97AD | 0.072 |
| Deuteranopia (no green cones) | #808CAC | 0.064 |
| Tritanopia (no blue cones) | #06A2A0 | 0.046 |
| Achromatopsia (no color) | #919191 | 0.079 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #509BAC
#509BAC
oklch(64.8% 0.078 214.4)
- #B97D6F
#B97D6F
oklch(64.7% 0.078 33.7)
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 #509BAC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cadet Blue #5F9EA0 ΔE 0.026
- Sea #3C9992 ΔE 0.044
- Greyblue #77A1B5 ΔE 0.048
- Dull Teal #5F9E8F ΔE 0.048
- Blue Grey #758DA3 ΔE 0.050
- Grey Teal #5E9B8A ΔE 0.051
- Silver Lake Blue #778DA9 ΔE 0.053
- Persian Green #2A9D8F ΔE 0.056
Use #509BAC 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.