#3648BD
Closest named color: Blue Blue (#2242C7). oklch(46.3% 0.183 270.6), rgb(54, 72, 189).
Aa
White text reads best on this color (7.45:1).
About this color
#3648BD is a medium-dark, vivid blue. In OKLCH its lightness is 46%, its chroma 0.183 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.030 away. White text reads best on it, at 7.45:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | vivid (0.183) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 2.81:1 |
| White text | 7.45:1 |
Values
| HEX | #3648BD |
| RGB | rgb(54, 72, 189) |
| HSL | hsl(232, 56%, 48%) |
| OKLCH | oklch(46.3% 0.183 270.6) |
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 #3648BD | 7.45:1 | AAA | Lc -90.2 | Preferred for body text |
| Black text on #3648BD | 2.81:1 | Fails | Lc 18.7 | Dividers and decoration only |
| #3648BD text on white | 7.45:1 | AAA | Lc 85.3 | Fine for body text |
| #3648BD text on black | 2.81:1 | Fails | Lc -16.7 | 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 700.
-
Step 50
50
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E3E9FC
oklch(93.5% 0.027 271.9)
-
Step 200
200
#CDD8FB
oklch(88.5% 0.05 271.6)
-
Step 300
300
#ABBEFB
oklch(80.9% 0.089 270.9)
-
Step 400
400
#809AF9
oklch(70.7% 0.142 270.8)
-
Step 500
500
#627DF6
oklch(63.1% 0.182 270.9)
-
Step 600
600
#4B63E5
oklch(55.6% 0.198 270.7)
-
Step 700
700 (this color)
#3648BD
oklch(46.3% 0.183 270.6)
-
Step 800
800
#3243A1
oklch(42.7% 0.153 270.7)
-
Step 900
900
#2B3A7F
oklch(37.7% 0.118 270.6)
-
Step 950
950
#19234B
oklch(27.1% 0.075 270.2)
#3648BD 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) | #005BC1 | 0.050 |
| Deuteranopia (no green cones) | #004FBB | 0.036 |
| Tritanopia (no blue cones) | #00667B | 0.148 |
| Achromatopsia (no color) | #555555 | 0.184 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3648BD
#3648BD
oklch(46.3% 0.183 270.6)
- #6D5600
#6D5600
oklch(46.3% 0.095 90.7)
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 #3648BD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.030
- Majorelle Blue #3F37C9 ΔE 0.038
- Blue With A Hint Of Purple #533CC6 ΔE 0.046
- Blurple #5539CC ΔE 0.054
- Sapphire #2138AB ΔE 0.056
- Bluey Purple #6241C7 ΔE 0.067
- Blueberry #464196 ΔE 0.067
- Warm Blue #4B57DB ΔE 0.067
Use #3648BD 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.