#3F45DC
Closest named color: Majorelle Blue (#3F37C9). oklch(49.1% 0.224 272.8), rgb(63, 69, 220).
Aa
White text reads best on this color (6.78:1).
About this color
#3F45DC is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.224 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Majorelle Blue (#3F37C9), ΔE 0.042 away. White text reads best on it, at 6.78:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.224) |
| Temperature | cool |
| Nearest name | Majorelle Blue (#3F37C9) |
| Black text | 3.09:1 |
| White text | 6.78:1 |
Values
| HEX | #3F45DC |
| RGB | rgb(63, 69, 220) |
| HSL | hsl(238, 69%, 55%) |
| OKLCH | oklch(49.1% 0.224 272.8) |
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 #3F45DC | 6.78:1 | AA | Lc -87.6 | Fine for body text |
| Black text on #3F45DC | 3.09:1 | AA large text | Lc 21.5 | Dividers and decoration only |
| #3F45DC text on white | 6.78:1 | AA | Lc 82.6 | Fine for body text |
| #3F45DC text on black | 3.09:1 | AA large text | Lc -19.3 | 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
#F2F5FF
oklch(97.1% 0.014 272.7)
-
Step 100
100
#E3E9FF
oklch(93.6% 0.03 273.6)
-
Step 200
200
#CCD8FF
oklch(88.6% 0.055 271.8)
-
Step 300
300
#ACBDFF
oklch(80.9% 0.095 273)
-
Step 400
400
#8298FF
oklch(70.8% 0.152 272.8)
-
Step 500
500
#6579FF
oklch(63.1% 0.198 273)
-
Step 600
600
#4D57FC
oklch(55.6% 0.24 272.9)
-
Step 700
700 (this color)
#3F45DC
oklch(49.1% 0.224 272.8)
-
Step 800
800
#333AB2
oklch(42.6% 0.186 272.8)
-
Step 900
900
#2B348C
oklch(37.6% 0.145 272.8)
-
Step 950
950
#192052
oklch(27% 0.091 272.8)
#3F45DC 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) | #0063E1 | 0.068 |
| Deuteranopia (no green cones) | #0054D9 | 0.046 |
| Tritanopia (no blue cones) | #006E8B | 0.177 |
| Achromatopsia (no color) | #5B5B5B | 0.225 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F45DC
#3F45DC
oklch(49.1% 0.224 272.8)
- #745E00
#745E00
oklch(49% 0.1 92.9)
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 #3F45DC, closest first.
No curated palette has a color within ΔE 0.04 of #3F45DC.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Majorelle Blue #3F37C9 ΔE 0.042
- Warm Blue #4B57DB ΔE 0.044
- Blurple #5539CC ΔE 0.045
- Blue With A Hint Of Purple #533CC6 ΔE 0.048
- Blue Blue #2242C7 ΔE 0.048
- Purpley Blue #5F34E7 ΔE 0.053
- Azul #1D5DEC ΔE 0.058
- Light Royal Blue #3A2EFE ΔE 0.060
Use #3F45DC 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.