#2748A6
Closest named color: Cobalt (#1E488F). oklch(43.6% 0.157 265.6), rgb(39, 72, 166).
Aa
White text reads best on this color (8.19:1).
About this color
#2748A6 is a dark, vivid blue. In OKLCH its lightness is 44%, its chroma 0.157 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.039 away. White text reads best on it, at 8.19:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | vivid (0.157) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.56:1 |
| White text | 8.19:1 |
Values
| HEX | #2748A6 |
| RGB | rgb(39, 72, 166) |
| HSL | hsl(224, 62%, 40%) |
| OKLCH | oklch(43.6% 0.157 265.6) |
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 #2748A6 | 8.19:1 | AAA | Lc -92.5 | Preferred for body text |
| Black text on #2748A6 | 2.56:1 | Fails | Lc 16.2 | Dividers and decoration only |
| #2748A6 text on white | 8.19:1 | AAA | Lc 87.8 | Fine for body text |
| #2748A6 text on black | 2.56:1 | Fails | Lc -14.3 | 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
#E1EAFC
oklch(93.6% 0.026 264.4)
-
Step 200
200
#C9D9FC
oklch(88.5% 0.051 265.9)
-
Step 300
300
#A4C0FD
oklch(80.9% 0.092 265.3)
-
Step 400
400
#749DFC
oklch(70.8% 0.147 265.2)
-
Step 500
500
#5280F9
oklch(63% 0.188 265.6)
-
Step 600
600
#3966E8
oklch(55.6% 0.203 265.6)
-
Step 700
700
#2C54CA
oklch(49.2% 0.189 265.5)
-
Step 800
800 (this color)
#2748A6
oklch(43.6% 0.157 265.6)
-
Step 900
900
#223C81
oklch(37.8% 0.121 265.4)
-
Step 950
950
#14244C
oklch(27.1% 0.077 265.2)
#2748A6 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 | 0.035 |
| Deuteranopia (no green cones) | #0049A4 | 0.022 |
| Tritanopia (no blue cones) | #005F70 | 0.122 |
| Achromatopsia (no color) | #4F4F4F | 0.157 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2748A6
#2748A6
oklch(43.6% 0.157 265.6)
- #674D00
#674D00
oklch(43.6% 0.089 86.2)
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 #2748A6, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.039
- Sapphire #2138AB ΔE 0.040
- Blueberry #464196 ΔE 0.047
- Dusk Blue #26538D ΔE 0.054
- Blue Blue #2242C7 ΔE 0.055
- Dark Slate Blue #483D8B ΔE 0.063
- Light Navy #155084 ΔE 0.064
- Majorelle Blue #3F37C9 ΔE 0.069
Use #2748A6 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.