#2748A9
Closest named color: Sapphire (#2138AB). oklch(43.8% 0.161 265.7), rgb(39, 72, 169).
Aa
White text reads best on this color (8.12:1).
About this color
#2748A9 is a dark, vivid blue. In OKLCH its lightness is 44%, its chroma 0.161 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Sapphire (#2138AB), ΔE 0.040 away. White text reads best on it, at 8.12:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | vivid (0.161) |
| Temperature | cool |
| Nearest name | Sapphire (#2138AB) |
| Black text | 2.58:1 |
| White text | 8.12:1 |
Values
| HEX | #2748A9 |
| RGB | rgb(39, 72, 169) |
| HSL | hsl(225, 63%, 41%) |
| OKLCH | oklch(43.8% 0.161 265.7) |
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 #2748A9 | 8.12:1 | AAA | Lc -92.3 | Preferred for body text |
| Black text on #2748A9 | 2.58:1 | Fails | Lc 16.4 | Dividers and decoration only |
| #2748A9 text on white | 8.12:1 | AAA | Lc 87.6 | Fine for body text |
| #2748A9 text on black | 2.58:1 | Fails | Lc -14.5 | 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
#F1F5FE
oklch(97% 0.013 266.7)
-
Step 100
100
#E1EAFD
oklch(93.6% 0.028 265.4)
-
Step 200
200
#C9D9FD
oklch(88.5% 0.053 266.4)
-
Step 300
300
#A4C0FE
oklch(81% 0.093 265.6)
-
Step 400
400
#749CFE
oklch(70.7% 0.15 265.9)
-
Step 500
500
#5180FC
oklch(63.2% 0.192 265.6)
-
Step 600
600
#3865EB
oklch(55.6% 0.208 265.7)
-
Step 700
700
#2B53CD
oklch(49.2% 0.194 265.6)
-
Step 800
800 (this color)
#2748A9
oklch(43.8% 0.161 265.7)
-
Step 900
900
#213B83
oklch(37.7% 0.125 265.7)
-
Step 950
950
#14234D
oklch(27% 0.08 266.3)
#2748A9 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) | #0056AC | 0.037 |
| Deuteranopia (no green cones) | #004AA7 | 0.022 |
| Tritanopia (no blue cones) | #006071 | 0.126 |
| Achromatopsia (no color) | #505050 | 0.161 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2748A9
#2748A9
oklch(43.8% 0.161 265.7)
- #684D00
#684D00
oklch(43.7% 0.09 85.3)
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 #2748A9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sapphire #2138AB ΔE 0.040
- Cobalt #1E488F ΔE 0.044
- Blueberry #464196 ΔE 0.049
- Blue Blue #2242C7 ΔE 0.050
- Dusk Blue #26538D ΔE 0.057
- Majorelle Blue #3F37C9 ΔE 0.065
- Dark Slate Blue #483D8B ΔE 0.066
- Light Navy #155084 ΔE 0.069
Use #2748A9 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.