#19398B
Closest named color: Twilight Blue (#0A437A). oklch(37.6% 0.142 264.4), rgb(25, 57, 139).
Aa
White text reads best on this color (10.50:1).
About this color
#19398B is a dark, vivid blue. In OKLCH its lightness is 38%, its chroma 0.142 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.042 away. White text reads best on it, at 10.50:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | vivid (0.142) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.99:1 |
| White text | 10.50:1 |
Values
| HEX | #19398B |
| RGB | rgb(25, 57, 139) |
| HSL | hsl(223, 70%, 32%) |
| OKLCH | oklch(37.6% 0.142 264.4) |
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 #19398B | 10.50:1 | AAA | Lc -97.9 | Preferred for body text |
| Black text on #19398B | 1.99:1 | Fails | Lc 10.1 | Not readable |
| #19398B text on white | 10.50:1 | AAA | Lc 93.8 | Preferred for body text |
| #19398B text on black | 1.99:1 | Fails | Lc -8.7 | Not readable |
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 900.
-
Step 50
50
#F1F6FF
oklch(97.2% 0.013 262.4)
-
Step 100
100
#E0EAFF
oklch(93.6% 0.03 265.3)
-
Step 200
200
#C7D9FF
oklch(88.4% 0.056 265.2)
-
Step 300
300
#A2C0FF
oklch(80.9% 0.096 264.7)
-
Step 400
400
#709DFF
oklch(70.7% 0.152 264.2)
-
Step 500
500
#4B80FF
oklch(63.1% 0.197 264.4)
-
Step 600
600
#2861FB
oklch(55.7% 0.237 264.3)
-
Step 700
700
#1D4EDA
oklch(49% 0.22 264.4)
-
Step 800
800
#1942B0
oklch(42.8% 0.181 264.3)
-
Step 900
900 (this color)
#19398B
oklch(37.6% 0.142 264.4)
-
Step 950
950
#0F2352
oklch(27.1% 0.09 264)
#19398B 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) | #00458E | 0.032 |
| Deuteranopia (no green cones) | #003A89 | 0.015 |
| Tritanopia (no blue cones) | #004E5C | 0.111 |
| Achromatopsia (no color) | #3F3F3F | 0.142 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #19398B
#19398B
oklch(37.6% 0.142 264.4)
- #543D00
#543D00
oklch(37.5% 0.077 84.5)
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 #19398B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.042
- Cobalt #1E488F ΔE 0.042
- Sapphire #2138AB ΔE 0.054
- Marine Blue #01386A ΔE 0.060
- Dark Slate Blue #483D8B ΔE 0.065
- Light Navy #155084 ΔE 0.067
- Blueberry #464196 ΔE 0.068
- Royal #0C1793 ΔE 0.074
Use #19398B 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.