#3649B9
Closest named color: Blue Blue (#2242C7). oklch(46.1% 0.177 270.5), rgb(54, 73, 185).
Aa
White text reads best on this color (7.47:1).
About this color
#3649B9 is a medium-dark, vivid blue. In OKLCH its lightness is 46%, its chroma 0.177 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.035 away. White text reads best on it, at 7.47:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | vivid (0.177) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 2.81:1 |
| White text | 7.47:1 |
Values
| HEX | #3649B9 |
| RGB | rgb(54, 73, 185) |
| HSL | hsl(231, 55%, 47%) |
| OKLCH | oklch(46.1% 0.177 270.5) |
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 #3649B9 | 7.47:1 | AAA | Lc -90.3 | Preferred for body text |
| Black text on #3649B9 | 2.81:1 | Fails | Lc 18.6 | Dividers and decoration only |
| #3649B9 text on white | 7.47:1 | AAA | Lc 85.4 | Fine for body text |
| #3649B9 text on black | 2.81:1 | Fails | Lc -16.6 | 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 700.
-
Step 50
50
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3E9FB
oklch(93.5% 0.025 271.1)
-
Step 200
200
#CDD8FA
oklch(88.5% 0.048 271.2)
-
Step 300
300
#ABBEF9
oklch(80.8% 0.086 270.6)
-
Step 400
400
#809BF6
oklch(70.8% 0.137 270.1)
-
Step 500
500
#627EF2
oklch(63% 0.176 270.5)
-
Step 600
600
#4C64E1
oklch(55.6% 0.191 270.7)
-
Step 700
700 (this color)
#3649B9
oklch(46.1% 0.177 270.5)
-
Step 800
800
#32449E
oklch(42.7% 0.147 270.4)
-
Step 900
900
#2B3B7D
oklch(37.7% 0.113 270)
-
Step 950
950
#192349
oklch(27% 0.072 270)
#3649B9 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) | #005BBD | 0.049 |
| Deuteranopia (no green cones) | #004FB7 | 0.035 |
| Tritanopia (no blue cones) | #00657A | 0.141 |
| Achromatopsia (no color) | #555555 | 0.177 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3649B9
#3649B9
oklch(46.1% 0.177 270.5)
- #6C5500
#6C5500
oklch(46% 0.094 90.5)
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 #3649B9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.035
- Majorelle Blue #3F37C9 ΔE 0.044
- Blue With A Hint Of Purple #533CC6 ΔE 0.050
- Sapphire #2138AB ΔE 0.055
- Blurple #5539CC ΔE 0.058
- Blueberry #464196 ΔE 0.061
- Bluey Purple #6241C7 ΔE 0.069
- Warm Blue #4B57DB ΔE 0.070
Use #3649B9 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.