#193D78
Closest named color: Twilight Blue (#0A437A). oklch(36.9% 0.109 259.8), rgb(25, 61, 120).
Aa
White text reads best on this color (10.60:1).
About this color
#193D78 is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.109 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.018 away. White text reads best on it, at 10.60:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.109) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.98:1 |
| White text | 10.60:1 |
Values
| HEX | #193D78 |
| RGB | rgb(25, 61, 120) |
| HSL | hsl(217, 66%, 28%) |
| OKLCH | oklch(36.9% 0.109 259.8) |
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 #193D78 | 10.60:1 | AAA | Lc -98.2 | Preferred for body text |
| Black text on #193D78 | 1.98:1 | Fails | Lc 9.7 | Not readable |
| #193D78 text on white | 10.60:1 | AAA | Lc 94.2 | Preferred for body text |
| #193D78 text on black | 1.98:1 | Fails | Lc -8.3 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E1EBFA
oklch(93.7% 0.023 258.4)
-
Step 200
200
#C8DAF8
oklch(88.4% 0.046 260.7)
-
Step 300
300
#A2C2F6
oklch(80.9% 0.082 260)
-
Step 400
400
#6FA1F2
oklch(70.8% 0.131 259.7)
-
Step 500
500
#4886ED
oklch(63% 0.168 260)
-
Step 600
600
#296DDB
oklch(55.5% 0.182 259.8)
-
Step 700
700
#1C5BBE
oklch(49.1% 0.168 259.6)
-
Step 800
800
#1A4B9A
oklch(42.8% 0.14 259.8)
-
Step 900
900 (this color)
#193D78
oklch(36.9% 0.109 259.8)
-
Step 950
950
#112548
oklch(26.9% 0.07 260.7)
#193D78 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) | #1D437A | 0.019 |
| Deuteranopia (no green cones) | #033A77 | 0.018 |
| Tritanopia (no blue cones) | #004B54 | 0.086 |
| Achromatopsia (no color) | #3F3F3F | 0.109 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #193D78
#193D78
oklch(36.9% 0.109 259.8)
- #543A00
#543A00
oklch(36.9% 0.076 80.3)
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 #193D78, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.018
- Marine Blue #01386A ΔE 0.034
- Cobalt #1E488F ΔE 0.048
- Light Navy #155084 ΔE 0.057
- Prussian Blue #1D3557 ΔE 0.059
- Marine #042E60 ΔE 0.063
- Dark Grey Blue #29465B ΔE 0.065
- Deep Sea Blue #015482 ΔE 0.067
Use #193D78 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.