#3F4BBF
Closest named color: Blue With A Hint Of Purple (#533CC6). oklch(47.5% 0.18 272.9), rgb(63, 75, 191).
Aa
White text reads best on this color (7.07:1).
About this color
#3F4BBF is a medium-dark, vivid blue. In OKLCH its lightness is 47%, its chroma 0.180 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Blue With A Hint Of Purple (#533CC6), ΔE 0.041 away. White text reads best on it, at 7.07:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | vivid (0.180) |
| Temperature | cool |
| Nearest name | Blue With A Hint Of Purple (#533CC6) |
| Black text | 2.97:1 |
| White text | 7.07:1 |
Values
| HEX | #3F4BBF |
| RGB | rgb(63, 75, 191) |
| HSL | hsl(234, 50%, 50%) |
| OKLCH | oklch(47.5% 0.18 272.9) |
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 #3F4BBF | 7.07:1 | AAA | Lc -89.0 | Fine for body text |
| Black text on #3F4BBF | 2.97:1 | Fails | Lc 20.0 | Dividers and decoration only |
| #3F4BBF text on white | 7.07:1 | AAA | Lc 84.0 | Fine for body text |
| #3F4BBF text on black | 2.97:1 | Fails | Lc -18.0 | 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
#8499F7
oklch(70.7% 0.14 272.8)
-
Step 500
500
#687CF3
oklch(63% 0.178 273.1)
-
Step 600
600
#5262E2
oklch(55.6% 0.193 273)
-
Step 700
700 (this color)
#3F4BBF
oklch(47.5% 0.18 272.9)
-
Step 800
800
#37429F
oklch(42.7% 0.15 273.2)
-
Step 900
900
#2F397E
oklch(37.7% 0.116 273.3)
-
Step 950
950
#1B224A
oklch(27% 0.074 273)
#3F4BBF 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) | #005EC3 | 0.055 |
| Deuteranopia (no green cones) | #0053BD | 0.045 |
| Tritanopia (no blue cones) | #00687E | 0.147 |
| Achromatopsia (no color) | #585858 | 0.181 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F4BBF
#3F4BBF
oklch(47.5% 0.18 272.9)
- #6F5A00
#6F5A00
oklch(47.5% 0.097 93)
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 #3F4BBF, 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 0.041
- Blue Blue #2242C7 ΔE 0.042
- Majorelle Blue #3F37C9 ΔE 0.043
- Blurple #5539CC ΔE 0.049
- Warm Blue #4B57DB ΔE 0.055
- Bluey Purple #6241C7 ΔE 0.056
- Iris #6258C4 ΔE 0.063
- Blueberry #464196 ΔE 0.069
Use #3F4BBF 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.