#20539F
Closest named color: Dusk Blue (#26538D). oklch(45.2% 0.135 258.6), rgb(32, 83, 159).
Aa
White text reads best on this color (7.50:1).
About this color
#20539F is a medium-dark, moderately saturated blue. In OKLCH its lightness is 45%, its chroma 0.135 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.030 away. White text reads best on it, at 7.50:1.
| Hue family | Blues |
| Lightness | medium-dark (45%) |
| Chroma | moderately saturated (0.135) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.79:1 |
| White text | 7.50:1 |
Values
| HEX | #20539F |
| RGB | rgb(32, 83, 159) |
| HSL | hsl(216, 66%, 37%) |
| OKLCH | oklch(45.2% 0.135 258.6) |
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 #20539F | 7.50:1 | AAA | Lc -90.5 | Preferred for body text |
| Black text on #20539F | 2.79:1 | Fails | Lc 18.4 | Dividers and decoration only |
| #20539F text on white | 7.50:1 | AAA | Lc 85.6 | Fine for body text |
| #20539F text on black | 2.79:1 | Fails | Lc -16.4 | Dividers and decoration only |
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 800.
-
Step 50
50
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E1EBFA
oklch(93.7% 0.023 258.4)
-
Step 200
200
#C8DBF7
oklch(88.6% 0.044 258)
-
Step 300
300
#A2C2F4
oklch(80.8% 0.079 259.2)
-
Step 400
400
#6FA1EF
oklch(70.7% 0.127 259)
-
Step 500
500
#4788E9
oklch(63.2% 0.161 258.3)
-
Step 600
600
#286FD7
oklch(55.6% 0.175 258.6)
-
Step 700
700
#1A5CBB
oklch(49.1% 0.164 258.6)
-
Step 800
800 (this color)
#20539F
oklch(45.2% 0.135 258.6)
-
Step 900
900
#1B4078
oklch(37.7% 0.105 258.7)
-
Step 950
950
#112646
oklch(27% 0.066 258.6)
#20539F 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) | #295BA2 | 0.025 |
| Deuteranopia (no green cones) | #024F9D | 0.020 |
| Tritanopia (no blue cones) | #006571 | 0.104 |
| Achromatopsia (no color) | #555555 | 0.135 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #20539F
#20539F
oklch(45.2% 0.135 258.6)
- #724E00
#724E00
oklch(45.2% 0.094 78.1)
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 #20539F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.030
- Cobalt #1E488F ΔE 0.039
- Denim Blue #3B5B92 ΔE 0.044
- Light Navy #155084 ΔE 0.046
- Light Navy Blue #2E5A88 ΔE 0.048
- Deep Sea Blue #015482 ΔE 0.052
- Blueberry #464196 ΔE 0.059
- Twilight #4E518B ΔE 0.059
Use #20539F 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.