#539EAA
Closest named color: Cadet Blue (#5F9EA0). oklch(65.6% 0.076 209), rgb(83, 158, 170).
Aa
Black text reads best on this color (6.83:1).
About this color
#539EAA is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 66%, its chroma 0.076 and its hue 209°. Its hue sits on the cool side of the wheel. The nearest named color is Cadet Blue (#5F9EA0), ΔE 0.018 away. Black text reads best on it, at 6.83:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (66%) |
| Chroma | moderately saturated (0.076) |
| Temperature | cool |
| Nearest name | Cadet Blue (#5F9EA0) |
| Black text | 6.83:1 |
| White text | 3.07:1 |
Values
| HEX | #539EAA |
| RGB | rgb(83, 158, 170) |
| HSL | hsl(188, 34%, 50%) |
| OKLCH | oklch(65.6% 0.076 209) |
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 #539EAA | 3.07:1 | AA large text | Lc -62.8 | Content text, not long reading |
| Black text on #539EAA | 6.83:1 | AA | Lc 46.6 | Large or bold text, headings |
| #539EAA text on white | 3.07:1 | AA large text | Lc 57.4 | Large or bold text, headings |
| #539EAA text on black | 6.83:1 | AA | Lc -44.3 | 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
#E2ECEE
oklch(93.6% 0.011 211)
-
Step 200
200
#CADDE0
oklch(88.4% 0.021 208.1)
-
Step 300
300
#A6C8CE
oklch(81% 0.037 209.5)
-
Step 400
400
#74ABB5
oklch(70.7% 0.059 210.1)
-
Step 500
500 (this color)
#539EAA
oklch(65.6% 0.076 209)
-
Step 600
600
#28818D
oklch(55.7% 0.083 208)
-
Step 700
700
#196D78
oklch(49.2% 0.077 208.2)
-
Step 800
800
#195862
oklch(42.6% 0.064 210.2)
-
Step 900
900
#1C4950
oklch(37.7% 0.05 209.1)
-
Step 950
950
#122B2F
oklch(27.1% 0.032 209)
#539EAA 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) | #9399AB | 0.074 |
| Deuteranopia (no green cones) | #858FAA | 0.067 |
| Tritanopia (no blue cones) | #1AA4A2 | 0.040 |
| Achromatopsia (no color) | #939393 | 0.077 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #539EAA
#539EAA
oklch(65.6% 0.076 209)
- #BB7F76
#BB7F76
oklch(65.5% 0.076 28.7)
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 #539EAA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cadet Blue #5F9EA0 ΔE 0.018
- Dull Teal #5F9E8F ΔE 0.041
- Sea #3C9992 ΔE 0.043
- Greyblue #77A1B5 ΔE 0.043
- Grey Teal #5E9B8A ΔE 0.046
- Persian Green #2A9D8F ΔE 0.053
- Blue Grey #758DA3 ΔE 0.055
- Silver Lake Blue #778DA9 ΔE 0.058
Use #539EAA 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.