#2749B5
Closest named color: Blue Blue (#2242C7). oklch(45.1% 0.176 266), rgb(39, 73, 181).
Aa
White text reads best on this color (7.75:1).
About this color
#2749B5 is a medium-dark, vivid blue. In OKLCH its lightness is 45%, its chroma 0.176 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.033 away. White text reads best on it, at 7.75:1.
| Hue family | Blues |
| Lightness | medium-dark (45%) |
| Chroma | vivid (0.176) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 2.70:1 |
| White text | 7.75:1 |
Values
| HEX | #2749B5 |
| RGB | rgb(39, 73, 181) |
| HSL | hsl(226, 65%, 43%) |
| OKLCH | oklch(45.1% 0.176 266) |
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 #2749B5 | 7.75:1 | AAA | Lc -91.1 | Preferred for body text |
| Black text on #2749B5 | 2.70:1 | Fails | Lc 17.7 | Dividers and decoration only |
| #2749B5 text on white | 7.75:1 | AAA | Lc 86.3 | Fine for body text |
| #2749B5 text on black | 2.70:1 | Fails | Lc -15.7 | 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
#E1EAFF
oklch(93.7% 0.03 267.2)
-
Step 200
200
#C8D9FF
oklch(88.5% 0.056 266.2)
-
Step 300
300
#A4C0FF
oklch(81% 0.095 265.8)
-
Step 400
400
#749CFF
oklch(70.8% 0.152 266)
-
Step 500
500
#517FFF
oklch(63.2% 0.197 266)
-
Step 600
600
#3461F6
oklch(55.6% 0.228 266)
-
Step 700
700
#284FD6
oklch(49.1% 0.211 266)
-
Step 800
800 (this color)
#2749B5
oklch(45.1% 0.176 266)
-
Step 900
900
#1F3989
oklch(37.7% 0.137 266.2)
-
Step 950
950
#122250
oklch(26.9% 0.087 266.2)
#2749B5 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) | #0059B9 | 0.040 |
| Deuteranopia (no green cones) | #004CB3 | 0.021 |
| Tritanopia (no blue cones) | #006478 | 0.136 |
| Achromatopsia (no color) | #525252 | 0.176 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2749B5
#2749B5
oklch(45.1% 0.176 266)
- #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 #2749B5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.033
- Sapphire #2138AB ΔE 0.045
- Majorelle Blue #3F37C9 ΔE 0.052
- Blueberry #464196 ΔE 0.063
- Cobalt #1E488F ΔE 0.063
- Blue With A Hint Of Purple #533CC6 ΔE 0.065
- Dusk Blue #26538D ΔE 0.073
- Blurple #5539CC ΔE 0.073
Use #2749B5 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.