#19539F
Closest named color: Dusk Blue (#26538D). oklch(45% 0.137 257.1), rgb(25, 83, 159).
Aa
White text reads best on this color (7.55:1).
About this color
#19539F is a dark, moderately saturated blue. In OKLCH its lightness is 45%, its chroma 0.137 and its hue 257°. 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 7.55:1.
| Hue family | Blues |
| Lightness | dark (45%) |
| Chroma | moderately saturated (0.137) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.77:1 |
| White text | 7.55:1 |
Values
| HEX | #19539F |
| RGB | rgb(25, 83, 159) |
| HSL | hsl(214, 73%, 36%) |
| OKLCH | oklch(45% 0.137 257.1) |
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 #19539F | 7.55:1 | AAA | Lc -90.6 | Preferred for body text |
| Black text on #19539F | 2.77:1 | Fails | Lc 18.2 | Dividers and decoration only |
| #19539F text on white | 7.55:1 | AAA | Lc 85.8 | Fine for body text |
| #19539F text on black | 2.77:1 | Fails | Lc -16.3 | 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
#E0EBFA
oklch(93.6% 0.024 256.1)
-
Step 200
200
#C7DBF7
oklch(88.5% 0.044 256.8)
-
Step 300
300
#A0C3F4
oklch(80.9% 0.079 256.8)
-
Step 400
400
#6BA2EF
oklch(70.7% 0.128 257)
-
Step 500
500
#4188EA
oklch(63% 0.164 257.2)
-
Step 600
600
#1E70D8
oklch(55.6% 0.177 257)
-
Step 700
700
#0E5DBC
oklch(49.2% 0.166 257)
-
Step 800
800 (this color)
#19539F
oklch(45% 0.137 257.1)
-
Step 900
900
#174079
oklch(37.6% 0.107 257.5)
-
Step 950
950
#0F2647
oklch(27% 0.068 257.7)
#19539F 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) | #285BA2 | 0.027 |
| Deuteranopia (no green cones) | #004F9D | 0.017 |
| Tritanopia (no blue cones) | #006571 | 0.104 |
| Achromatopsia (no color) | #545454 | 0.137 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #19539F
#19539F
oklch(45% 0.137 257.1)
- #724D00
#724D00
oklch(45% 0.094 77)
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 #19539F, 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 0.038
- Light Navy #155084 ΔE 0.045
- Denim Blue #3B5B92 ΔE 0.047
- Light Navy Blue #2E5A88 ΔE 0.049
- Deep Sea Blue #015482 ΔE 0.051
- Blueberry #464196 ΔE 0.062
- Peacock Blue #016795 ΔE 0.063
Use #19539F 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.