#3F48C0
Closest named color: Blue With A Hint Of Purple (#533CC6). oklch(47% 0.185 273.6), rgb(63, 72, 192).
Aa
White text reads best on this color (7.24:1).
About this color
#3F48C0 is a medium-dark, vivid blue. In OKLCH its lightness is 47%, its chroma 0.185 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 0.036 away. White text reads best on it, at 7.24:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | vivid (0.185) |
| Temperature | cool |
| Nearest name | Blue With A Hint Of Purple (#533CC6) |
| Black text | 2.89:1 |
| White text | 7.24:1 |
Values
| HEX | #3F48C0 |
| RGB | rgb(63, 72, 192) |
| HSL | hsl(236, 51%, 50%) |
| OKLCH | oklch(47% 0.185 273.6) |
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 #3F48C0 | 7.24:1 | AAA | Lc -89.5 | Fine for body text |
| Black text on #3F48C0 | 2.89:1 | Fails | Lc 19.4 | Dividers and decoration only |
| #3F48C0 text on white | 7.24:1 | AAA | Lc 84.6 | Fine for body text |
| #3F48C0 text on black | 2.89:1 | Fails | Lc -17.4 | 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
#E4E9FC
oklch(93.6% 0.026 274.1)
-
Step 200
200
#CED8FB
oklch(88.6% 0.049 272.8)
-
Step 300
300
#AEBDFB
oklch(80.9% 0.089 273.7)
-
Step 400
400
#8598F9
oklch(70.7% 0.143 273.8)
-
Step 500
500
#697BF6
oklch(63.1% 0.183 273.7)
-
Step 600
600
#5360E5
oklch(55.5% 0.199 273.7)
-
Step 700
700 (this color)
#3F48C0
oklch(47% 0.185 273.6)
-
Step 800
800
#3841A1
oklch(42.7% 0.154 273.9)
-
Step 900
900
#2F3980
oklch(37.8% 0.119 273.3)
-
Step 950
950
#1B224B
oklch(27% 0.076 273)
#3F48C0 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) | #005DC4 | 0.058 |
| Deuteranopia (no green cones) | #0051BE | 0.046 |
| Tritanopia (no blue cones) | #00667D | 0.150 |
| Achromatopsia (no color) | #575757 | 0.186 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F48C0
#3F48C0
oklch(47% 0.185 273.6)
- #6D5900
#6D5900
oklch(47% 0.096 93.7)
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 #3F48C0, 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 0.036
- Majorelle Blue #3F37C9 ΔE 0.036
- Blue Blue #2242C7 ΔE 0.038
- Blurple #5539CC ΔE 0.044
- Bluey Purple #6241C7 ΔE 0.055
- Warm Blue #4B57DB ΔE 0.058
- Sapphire #2138AB ΔE 0.066
- Iris #6258C4 ΔE 0.068
Use #3F48C0 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.