#2748BB
Closest named color: Blue Blue (#2242C7). oklch(45.4% 0.185 266.4), rgb(39, 72, 187).
Aa
White text reads best on this color (7.69:1).
About this color
#2748BB is a medium-dark, vivid blue. In OKLCH its lightness is 45%, its chroma 0.185 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.024 away. White text reads best on it, at 7.69:1.
| Hue family | Blues |
| Lightness | medium-dark (45%) |
| Chroma | vivid (0.185) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 2.73:1 |
| White text | 7.69:1 |
Values
| HEX | #2748BB |
| RGB | rgb(39, 72, 187) |
| HSL | hsl(227, 65%, 44%) |
| OKLCH | oklch(45.4% 0.185 266.4) |
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 #2748BB | 7.69:1 | AAA | Lc -90.9 | Preferred for body text |
| Black text on #2748BB | 2.73:1 | Fails | Lc 18.0 | Dividers and decoration only |
| #2748BB text on white | 7.69:1 | AAA | Lc 86.1 | Fine for body text |
| #2748BB text on black | 2.73:1 | Fails | Lc -16.0 | Dividers and decoration only |
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
#F1F5FF
oklch(97% 0.014 268.5)
-
Step 100
100
#E0EAFF
oklch(93.6% 0.03 265.3)
-
Step 200
200
#C8D9FF
oklch(88.5% 0.056 266.2)
-
Step 300
300
#A4BFFF
oklch(80.8% 0.096 266.6)
-
Step 400
400
#759CFF
oklch(70.8% 0.151 266.4)
-
Step 500
500
#527EFF
oklch(63% 0.198 266.5)
-
Step 600
600
#335EFD
oklch(55.7% 0.24 266.4)
-
Step 700
700
#274CDC
oklch(49.1% 0.222 266.3)
-
Step 800
800 (this color)
#2748BB
oklch(45.4% 0.185 266.4)
-
Step 900
900
#1E388D
oklch(37.8% 0.145 266.4)
-
Step 950
950
#122252
oklch(27.1% 0.09 266.4)
#2748BB 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) | #005ABF | 0.044 |
| Deuteranopia (no green cones) | #004CB9 | 0.021 |
| Tritanopia (no blue cones) | #00667A | 0.145 |
| Achromatopsia (no color) | #535353 | 0.185 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2748BB
#2748BB
oklch(45.4% 0.185 266.4)
- #6D5200
#6D5200
oklch(45.4% 0.093 86.5)
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 #2748BB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.024
- Majorelle Blue #3F37C9 ΔE 0.045
- Sapphire #2138AB ΔE 0.047
- Blue With A Hint Of Purple #533CC6 ΔE 0.061
- Blurple #5539CC ΔE 0.068
- Blueberry #464196 ΔE 0.070
- Cobalt #1E488F ΔE 0.072
- Warm Blue #4B57DB ΔE 0.078
Use #2748BB 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.