#2748B9
Closest named color: Blue Blue (#2242C7). oklch(45.2% 0.182 266.4), rgb(39, 72, 185).
Aa
White text reads best on this color (7.73:1).
About this color
#2748B9 is a medium-dark, vivid blue. In OKLCH its lightness is 45%, its chroma 0.182 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.026 away. White text reads best on it, at 7.73:1.
| Hue family | Blues |
| Lightness | medium-dark (45%) |
| Chroma | vivid (0.182) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 2.71:1 |
| White text | 7.73:1 |
Values
| HEX | #2748B9 |
| RGB | rgb(39, 72, 185) |
| HSL | hsl(226, 65%, 44%) |
| OKLCH | oklch(45.2% 0.182 266.4) |
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 #2748B9 | 7.73:1 | AAA | Lc -91.0 | Preferred for body text |
| Black text on #2748B9 | 2.71:1 | Fails | Lc 17.8 | Dividers and decoration only |
| #2748B9 text on white | 7.73:1 | AAA | Lc 86.2 | Fine for body text |
| #2748B9 text on black | 2.71:1 | Fails | Lc -15.8 | 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
#749CFF
oklch(70.8% 0.152 266)
-
Step 500
500
#527EFF
oklch(63% 0.198 266.5)
-
Step 600
600
#345FFB
oklch(55.7% 0.236 266.4)
-
Step 700
700
#284CDB
oklch(49.1% 0.221 266.5)
-
Step 800
800 (this color)
#2748B9
oklch(45.2% 0.182 266.4)
-
Step 900
900
#1F388C
oklch(37.7% 0.143 266.7)
-
Step 950
950
#122252
oklch(27.1% 0.09 266.4)
#2748B9 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) | #005ABD | 0.044 |
| Deuteranopia (no green cones) | #004CB7 | 0.021 |
| Tritanopia (no blue cones) | #006579 | 0.143 |
| Achromatopsia (no color) | #535353 | 0.182 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2748B9
#2748B9
oklch(45.2% 0.182 266.4)
- #6C5100
#6C5100
oklch(45.1% 0.092 86.3)
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 #2748B9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.026
- Sapphire #2138AB ΔE 0.045
- Majorelle Blue #3F37C9 ΔE 0.046
- Blue With A Hint Of Purple #533CC6 ΔE 0.062
- Blueberry #464196 ΔE 0.067
- Cobalt #1E488F ΔE 0.069
- Blurple #5539CC ΔE 0.069
- Dusk Blue #26538D ΔE 0.079
Use #2748B9 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.