#20579B
Closest named color: Dusk Blue (#26538D). oklch(45.8% 0.125 255.7), rgb(32, 87, 155).
Aa
White text reads best on this color (7.24:1).
About this color
#20579B is a medium-dark, moderately saturated blue. In OKLCH its lightness is 46%, its chroma 0.125 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.024 away. White text reads best on it, at 7.24:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.125) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.89:1 |
| White text | 7.24:1 |
Values
| HEX | #20579B |
| RGB | rgb(32, 87, 155) |
| HSL | hsl(213, 66%, 37%) |
| OKLCH | oklch(45.8% 0.125 255.7) |
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 #20579B | 7.24:1 | AAA | Lc -89.7 | Fine for body text |
| Black text on #20579B | 2.89:1 | Fails | Lc 19.3 | Dividers and decoration only |
| #20579B text on white | 7.24:1 | AAA | Lc 84.8 | Fine for body text |
| #20579B text on black | 2.89:1 | Fails | Lc -17.2 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E1EBF8
oklch(93.6% 0.021 254.9)
-
Step 200
200
#C8DBF4
oklch(88.5% 0.04 255.3)
-
Step 300
300
#A2C3F0
oklch(80.9% 0.073 256.2)
-
Step 400
400
#6EA3E8
oklch(70.7% 0.116 255.5)
-
Step 500
500
#468AE1
oklch(63.1% 0.149 255.7)
-
Step 600
600
#2472CF
oklch(55.6% 0.162 255.6)
-
Step 700
700
#165FB3
oklch(49.1% 0.15 255.6)
-
Step 800
800 (this color)
#20579B
oklch(45.8% 0.125 255.7)
-
Step 900
900
#194174
oklch(37.6% 0.098 256)
-
Step 950
950
#102744
oklch(27.1% 0.062 255.3)
#20579B 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) | #355D9E | 0.028 |
| Deuteranopia (no green cones) | #1D529A | 0.015 |
| Tritanopia (no blue cones) | #006771 | 0.095 |
| Achromatopsia (no color) | #575757 | 0.125 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #20579B
#20579B
oklch(45.8% 0.125 255.7)
- #764E00
#764E00
oklch(45.7% 0.096 75.1)
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 #20579B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.024
- Denim Blue #3B5B92 ΔE 0.033
- Light Navy Blue #2E5A88 ΔE 0.036
- Light Navy #155084 ΔE 0.042
- Cobalt #1E488F ΔE 0.045
- Deep Sea Blue #015482 ΔE 0.046
- Peacock Blue #016795 ΔE 0.050
- Dusky Blue #475F94 ΔE 0.050
Use #20579B 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.