#3F48BD
Closest named color: Blue With A Hint Of Purple (#533CC6). oklch(46.8% 0.181 273.7), rgb(63, 72, 189).
Aa
White text reads best on this color (7.30:1).
About this color
#3F48BD is a medium-dark, vivid blue. In OKLCH its lightness is 47%, its chroma 0.181 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Blue With A Hint Of Purple (#533CC6), ΔE 0.038 away. White text reads best on it, at 7.30:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | vivid (0.181) |
| Temperature | cool |
| Nearest name | Blue With A Hint Of Purple (#533CC6) |
| Black text | 2.87:1 |
| White text | 7.30:1 |
Values
| HEX | #3F48BD |
| RGB | rgb(63, 72, 189) |
| HSL | hsl(236, 50%, 49%) |
| OKLCH | oklch(46.8% 0.181 273.7) |
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 #3F48BD | 7.30:1 | AAA | Lc -89.8 | Fine for body text |
| Black text on #3F48BD | 2.87:1 | Fails | Lc 19.2 | Dividers and decoration only |
| #3F48BD text on white | 7.30:1 | AAA | Lc 84.9 | Fine for body text |
| #3F48BD text on black | 2.87:1 | Fails | Lc -17.1 | 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
#F3F5FE
oklch(97.1% 0.012 276.1)
-
Step 100
100
#E4E9FB
oklch(93.6% 0.025 273.5)
-
Step 200
200
#CED8FA
oklch(88.5% 0.048 272.4)
-
Step 300
300
#AEBDFA
oklch(80.9% 0.088 273.6)
-
Step 400
400
#8598F7
oklch(70.6% 0.141 273.7)
-
Step 500
500
#6A7CF4
oklch(63.2% 0.179 273.7)
-
Step 600
600
#5461E3
oklch(55.6% 0.195 273.9)
-
Step 700
700 (this color)
#3F48BD
oklch(46.8% 0.181 273.7)
-
Step 800
800
#38429F
oklch(42.7% 0.15 273.6)
-
Step 900
900
#30397E
oklch(37.7% 0.116 273.9)
-
Step 950
950
#1C224A
oklch(27% 0.074 274)
#3F48BD 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) | #005CC1 | 0.057 |
| Deuteranopia (no green cones) | #0051BB | 0.046 |
| Tritanopia (no blue cones) | #00667B | 0.150 |
| Achromatopsia (no color) | #565656 | 0.182 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F48BD
#3F48BD
oklch(46.8% 0.181 273.7)
- #6C5800
#6C5800
oklch(46.7% 0.096 93.5)
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 #3F48BD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue With A Hint Of Purple #533CC6 ΔE 0.038
- Majorelle Blue #3F37C9 ΔE 0.039
- Blue Blue #2242C7 ΔE 0.040
- Blurple #5539CC ΔE 0.046
- Bluey Purple #6241C7 ΔE 0.056
- Warm Blue #4B57DB ΔE 0.062
- Sapphire #2138AB ΔE 0.064
- Blueberry #464196 ΔE 0.064
Use #3F48BD 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.