#193B59
Closest named color: Prussian Blue (#1D3557). oklch(34.3% 0.066 247.7), rgb(25, 59, 89).
Aa
White text reads best on this color (11.59:1).
About this color
#193B59 is a dark, muted blue. In OKLCH its lightness is 34%, its chroma 0.066 and its hue 248°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.019 away. White text reads best on it, at 11.59:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | muted (0.066) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.81:1 |
| White text | 11.59:1 |
Values
| HEX | #193B59 |
| RGB | rgb(25, 59, 89) |
| HSL | hsl(208, 56%, 22%) |
| OKLCH | oklch(34.3% 0.066 247.7) |
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 #193B59 | 11.59:1 | AAA | Lc -100.2 | Preferred for body text |
| Black text on #193B59 | 1.81:1 | Fails | Lc 7.4 | Not readable |
| #193B59 text on white | 11.59:1 | AAA | Lc 96.5 | Preferred for body text |
| #193B59 text on black | 1.81:1 | Fails | Lc 0.0 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E3EBF3
oklch(93.6% 0.014 248)
-
Step 200
200
#CBDBEB
oklch(88.4% 0.028 248.1)
-
Step 300
300
#A8C4E0
oklch(80.9% 0.05 248.4)
-
Step 400
400
#79A5D0
oklch(70.6% 0.079 248.4)
-
Step 500
500
#548EC4
oklch(63% 0.102 248.1)
-
Step 600
600
#3778B0
oklch(55.6% 0.11 247.3)
-
Step 700
700
#296498
oklch(49% 0.104 248.3)
-
Step 800
800
#24527B
oklch(42.7% 0.085 248.1)
-
Step 900
900 (this color)
#193B59
oklch(34.3% 0.066 247.7)
-
Step 950
950
#15283A
oklch(27% 0.042 248.4)
#193B59 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) | #2E3C5A | 0.026 |
| Deuteranopia (no green cones) | #253658 | 0.019 |
| Tritanopia (no blue cones) | #004246 | 0.049 |
| Achromatopsia (no color) | #393939 | 0.066 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #193B59
#193B59
oklch(34.3% 0.066 247.7)
- #4F310C
#4F310C
oklch(34.2% 0.066 67.3)
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 #193B59, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.019
- Dark Blue Grey #1F3B4D ΔE 0.022
- Midnight Green #073B4C ΔE 0.028
- Marine Blue #01386A ΔE 0.036
- Dark Grey Blue #29465B ΔE 0.042
- Charcoal #264653 ΔE 0.044
- Gunmetal #293241 ΔE 0.046
- Marine #042E60 ΔE 0.050
Use #193B59 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.