#539EA8
Closest named color: Cadet Blue (#5F9EA0). oklch(65.5% 0.076 206.8), rgb(83, 158, 168).
Aa
Black text reads best on this color (6.82:1).
About this color
#539EA8 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 65%, its chroma 0.076 and its hue 207°. 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 6.82:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (65%) |
| Chroma | moderately saturated (0.076) |
| Temperature | cool |
| Nearest name | Cadet Blue (#5F9EA0) |
| Black text | 6.82:1 |
| White text | 3.07:1 |
Values
| HEX | #539EA8 |
| RGB | rgb(83, 158, 168) |
| HSL | hsl(187, 34%, 49%) |
| OKLCH | oklch(65.5% 0.076 206.8) |
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 #539EA8 | 3.07:1 | AA large text | Lc -62.9 | Content text, not long reading |
| Black text on #539EA8 | 6.82:1 | AA | Lc 46.5 | Large or bold text, headings |
| #539EA8 text on white | 3.07:1 | AA large text | Lc 57.5 | Large or bold text, headings |
| #539EA8 text on black | 6.82:1 | AA | Lc -44.2 | 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
#E2ECED
oklch(93.6% 0.011 204.1)
-
Step 200
200
#CADDE0
oklch(88.4% 0.021 208.1)
-
Step 300
300
#A6C8CD
oklch(81% 0.037 207.3)
-
Step 400
400
#74ACB3
oklch(70.8% 0.059 205.8)
-
Step 500
500 (this color)
#539EA8
oklch(65.5% 0.076 206.8)
-
Step 600
600
#28818C
oklch(55.7% 0.083 207)
-
Step 700
700
#196D77
oklch(49.2% 0.077 207)
-
Step 800
800
#195960
oklch(42.8% 0.063 205.6)
-
Step 900
900
#1C494F
oklch(37.7% 0.05 207.2)
-
Step 950
950
#122B2E
oklch(27.1% 0.031 205.7)
#539EA8 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) | #9399A9 | 0.074 |
| Deuteranopia (no green cones) | #868FA8 | 0.068 |
| Tritanopia (no blue cones) | #1DA4A1 | 0.038 |
| Achromatopsia (no color) | #939393 | 0.076 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #539EA8
#539EA8
oklch(65.5% 0.076 206.8)
- #BB7F78
#BB7F78
oklch(65.6% 0.076 26.7)
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 #539EA8, 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 0.038
- Sea #3C9992 ΔE 0.041
- Grey Teal #5E9B8A ΔE 0.043
- Greyblue #77A1B5 ΔE 0.045
- Persian Green #2A9D8F ΔE 0.051
- Blue Grey #758DA3 ΔE 0.055
- Blue Green #0F9B8E ΔE 0.058
Use #539EA8 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.