#1748A6
Closest named color: Cobalt (#1E488F). oklch(43% 0.161 261.7), rgb(23, 72, 166).
Aa
White text reads best on this color (8.35:1).
About this color
#1748A6 is a dark, vivid blue. In OKLCH its lightness is 43%, its chroma 0.161 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.038 away. White text reads best on it, at 8.35:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | vivid (0.161) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.51:1 |
| White text | 8.35:1 |
Values
| HEX | #1748A6 |
| RGB | rgb(23, 72, 166) |
| HSL | hsl(219, 76%, 37%) |
| OKLCH | oklch(43% 0.161 261.7) |
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 #1748A6 | 8.35:1 | AAA | Lc -92.8 | Preferred for body text |
| Black text on #1748A6 | 2.51:1 | Fails | Lc 15.8 | Dividers and decoration only |
| #1748A6 text on white | 8.35:1 | AAA | Lc 88.2 | Fine for body text |
| #1748A6 text on black | 2.51:1 | Fails | Lc -14.0 | 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 800.
-
Step 50
50
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E0EAFD
oklch(93.5% 0.028 263.4)
-
Step 200
200
#C6DAFC
oklch(88.4% 0.052 261.1)
-
Step 300
300
#9FC1FE
oklch(80.8% 0.094 261.9)
-
Step 400
400
#6B9EFD
oklch(70.6% 0.15 261.9)
-
Step 500
500
#4383FB
oklch(63.1% 0.191 261.6)
-
Step 600
600
#2468EB
oklch(55.6% 0.21 261.8)
-
Step 700
700
#1856CC
oklch(49.2% 0.193 261.7)
-
Step 800
800 (this color)
#1748A6
oklch(43% 0.161 261.7)
-
Step 900
900
#183D83
oklch(37.7% 0.126 261.6)
-
Step 950
950
#0F244C
oklch(26.9% 0.079 261.8)
#1748A6 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) | #0055A9 | 0.034 |
| Deuteranopia (no green cones) | #0048A4 | 0.011 |
| Tritanopia (no blue cones) | #006070 | 0.124 |
| Achromatopsia (no color) | #4E4E4E | 0.161 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1748A6
#1748A6
oklch(43% 0.161 261.7)
- #684A00
#684A00
oklch(43% 0.089 81.9)
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 #1748A6, closest first.
No curated palette has a color within ΔE 0.04 of #1748A6.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.038
- Sapphire #2138AB ΔE 0.038
- Blue Blue #2242C7 ΔE 0.055
- Dusk Blue #26538D ΔE 0.056
- Blueberry #464196 ΔE 0.057
- Light Navy #155084 ΔE 0.063
- Dark Slate Blue #483D8B ΔE 0.071
- Deep Sea Blue #015482 ΔE 0.072
Use #1748A6 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.