#00539A
Closest named color: Dusk Blue (#26538D). oklch(44.2% 0.134 252.6), rgb(0, 83, 154).
Aa
White text reads best on this color (7.76:1).
About this color
#00539A is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.134 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.027 away. White text reads best on it, at 7.76:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.134) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.70:1 |
| White text | 7.76:1 |
Values
| HEX | #00539A |
| RGB | rgb(0, 83, 154) |
| HSL | hsl(208, 100%, 30%) |
| OKLCH | oklch(44.2% 0.134 252.6) |
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 #00539A | 7.76:1 | AAA | Lc -91.1 | Preferred for body text |
| Black text on #00539A | 2.70:1 | Fails | Lc 17.7 | Dividers and decoration only |
| #00539A text on white | 7.76:1 | AAA | Lc 86.3 | Fine for body text |
| #00539A text on black | 2.70:1 | Fails | Lc -15.8 | 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
#DFEBF9
oklch(93.5% 0.023 252.2)
-
Step 200
200
#C5DCF6
oklch(88.6% 0.044 251.5)
-
Step 300
300
#9CC4F3
oklch(80.8% 0.079 252.8)
-
Step 400
400
#64A4ED
oklch(70.7% 0.126 252.8)
-
Step 500
500
#338BE7
oklch(63% 0.161 252.8)
-
Step 600
600
#0073D2
oklch(55.5% 0.17 252.7)
-
Step 700
700
#0061B2
oklch(49.2% 0.149 252.5)
-
Step 800
800 (this color)
#00539A
oklch(44.2% 0.134 252.6)
-
Step 900
900
#0C4277
oklch(37.7% 0.105 252.7)
-
Step 950
950
#0A2746
oklch(27% 0.067 252.9)
#00539A 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) | #2C599D | 0.033 |
| Deuteranopia (no green cones) | #034D99 | 0.017 |
| Tritanopia (no blue cones) | #00646F | 0.098 |
| Achromatopsia (no color) | #525252 | 0.134 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #00539A
#00539A
oklch(44.2% 0.134 252.6)
- #724900
#724900
oklch(44.1% 0.094 72.7)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes and gradients that use #00539A
These curated palettes and gradients contain exactly #00539A. Open one to see the full color scheme around it.
Gradients
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.027
- Cobalt #1E488F ΔE 0.034
- Light Navy #155084 ΔE 0.036
- Deep Sea Blue #015482 ΔE 0.041
- Light Navy Blue #2E5A88 ΔE 0.048
- Denim Blue #3B5B92 ΔE 0.052
- Peacock Blue #016795 ΔE 0.062
- Twilight Blue #0A437A ΔE 0.066
Use #00539A 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.