#3947D9
Closest named color: Majorelle Blue (#3F37C9). oklch(48.8% 0.22 271), rgb(57, 71, 217).
Aa
White text reads best on this color (6.82:1).
About this color
#3947D9 is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.220 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Majorelle Blue (#3F37C9), ΔE 0.041 away. White text reads best on it, at 6.82:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.220) |
| Temperature | cool |
| Nearest name | Majorelle Blue (#3F37C9) |
| Black text | 3.07:1 |
| White text | 6.82:1 |
Values
| HEX | #3947D9 |
| RGB | rgb(57, 71, 217) |
| HSL | hsl(235, 68%, 54%) |
| OKLCH | oklch(48.8% 0.22 271) |
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 #3947D9 | 6.82:1 | AA | Lc -87.8 | Fine for body text |
| Black text on #3947D9 | 3.07:1 | AA large text | Lc 21.3 | Dividers and decoration only |
| #3947D9 text on white | 6.82:1 | AA | Lc 82.8 | Fine for body text |
| #3947D9 text on black | 3.07:1 | AA large text | Lc -19.2 | 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
#E2E9FF
oklch(93.5% 0.031 271.7)
-
Step 200
200
#CBD8FF
oklch(88.5% 0.056 270.7)
-
Step 300
300
#AABEFF
oklch(81% 0.095 271)
-
Step 400
400
#7E99FF
oklch(70.7% 0.152 270.9)
-
Step 500
500
#607BFF
oklch(63.2% 0.197 271)
-
Step 600
600
#475AFA
oklch(55.6% 0.236 271)
-
Step 700
700 (this color)
#3947D9
oklch(48.8% 0.22 271)
-
Step 800
800
#2F3DB0
oklch(42.7% 0.181 270.9)
-
Step 900
900
#28368B
oklch(37.7% 0.141 270.8)
-
Step 950
950
#172151
oklch(27% 0.089 270.5)
#3947D9 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) | #0062DE | 0.062 |
| Deuteranopia (no green cones) | #0053D6 | 0.039 |
| Tritanopia (no blue cones) | #006F8A | 0.174 |
| Achromatopsia (no color) | #5B5B5B | 0.220 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3947D9
#3947D9
oklch(48.8% 0.22 271)
- #755D00
#755D00
oklch(48.8% 0.1 91.2)
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 #3947D9, closest first.
No curated palette has a color within ΔE 0.04 of #3947D9.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Majorelle Blue #3F37C9 ΔE 0.041
- Blue Blue #2242C7 ΔE 0.041
- Warm Blue #4B57DB ΔE 0.045
- Blurple #5539CC ΔE 0.049
- Blue With A Hint Of Purple #533CC6 ΔE 0.050
- Azul #1D5DEC ΔE 0.056
- Purpley Blue #5F34E7 ΔE 0.061
- Light Royal Blue #3A2EFE ΔE 0.064
Use #3947D9 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.