#1748AB
Closest named color: Sapphire (#2138AB). oklch(43.5% 0.167 262.2), rgb(23, 72, 171).
Aa
White text reads best on this color (8.23:1).
About this color
#1748AB is a dark, vivid blue. In OKLCH its lightness is 43%, its chroma 0.167 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Sapphire (#2138AB), ΔE 0.037 away. White text reads best on it, at 8.23:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | vivid (0.167) |
| Temperature | cool |
| Nearest name | Sapphire (#2138AB) |
| Black text | 2.55:1 |
| White text | 8.23:1 |
Values
| HEX | #1748AB |
| RGB | rgb(23, 72, 171) |
| HSL | hsl(220, 76%, 38%) |
| OKLCH | oklch(43.5% 0.167 262.2) |
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 #1748AB | 8.23:1 | AAA | Lc -92.5 | Preferred for body text |
| Black text on #1748AB | 2.55:1 | Fails | Lc 16.2 | Dividers and decoration only |
| #1748AB text on white | 8.23:1 | AAA | Lc 87.8 | Fine for body text |
| #1748AB text on black | 2.55:1 | Fails | Lc -14.4 | 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
#F1F6FF
oklch(97.2% 0.013 262.4)
-
Step 100
100
#E0EAFD
oklch(93.5% 0.028 263.4)
-
Step 200
200
#C6DAFE
oklch(88.5% 0.054 262.2)
-
Step 300
300
#9FC1FF
oklch(80.9% 0.096 262.2)
-
Step 400
400
#6B9EFF
oklch(70.7% 0.153 262.2)
-
Step 500
500
#4282FF
oklch(63.2% 0.198 262)
-
Step 600
600
#2366F0
oklch(55.6% 0.218 262.4)
-
Step 700
700
#1654D1
oklch(49.2% 0.203 262.2)
-
Step 800
800 (this color)
#1748AB
oklch(43.5% 0.167 262.2)
-
Step 900
900
#173C85
oklch(37.6% 0.13 262)
-
Step 950
950
#0F244E
oklch(27% 0.082 262.4)
#1748AB 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) | #0056AE | 0.036 |
| Deuteranopia (no green cones) | #0048A9 | 0.010 |
| Tritanopia (no blue cones) | #006172 | 0.128 |
| Achromatopsia (no color) | #4F4F4F | 0.167 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1748AB
#1748AB
oklch(43.5% 0.167 262.2)
- #694B00
#694B00
oklch(43.4% 0.089 82.2)
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 #1748AB, closest first.
No curated palette has a color within ΔE 0.04 of #1748AB.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sapphire #2138AB ΔE 0.037
- Cobalt #1E488F ΔE 0.046
- Blue Blue #2242C7 ΔE 0.047
- Blueberry #464196 ΔE 0.061
- Dusk Blue #26538D ΔE 0.062
- Majorelle Blue #3F37C9 ΔE 0.068
- Light Navy #155084 ΔE 0.070
- Dark Slate Blue #483D8B ΔE 0.076
Use #1748AB 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.