#3F47BD
Closest named color: Majorelle Blue (#3F37C9). oklch(46.6% 0.182 273.9), rgb(63, 71, 189).
Aa
White text reads best on this color (7.37:1).
About this color
#3F47BD is a medium-dark, vivid blue. In OKLCH its lightness is 47%, its chroma 0.182 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Majorelle Blue (#3F37C9), ΔE 0.037 away. White text reads best on it, at 7.37:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | vivid (0.182) |
| Temperature | cool |
| Nearest name | Majorelle Blue (#3F37C9) |
| Black text | 2.84:1 |
| White text | 7.37:1 |
Values
| HEX | #3F47BD |
| RGB | rgb(63, 71, 189) |
| HSL | hsl(236, 50%, 49%) |
| OKLCH | oklch(46.6% 0.182 273.9) |
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 #3F47BD | 7.37:1 | AAA | Lc -90.0 | Fine for body text |
| Black text on #3F47BD | 2.84:1 | Fails | Lc 18.9 | Dividers and decoration only |
| #3F47BD text on white | 7.37:1 | AAA | Lc 85.1 | Fine for body text |
| #3F47BD text on black | 2.84:1 | Fails | Lc -16.9 | 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
#CFD8FA
oklch(88.6% 0.048 273.7)
-
Step 300
300
#AEBDFA
oklch(80.9% 0.088 273.6)
-
Step 400
400
#8698F8
oklch(70.7% 0.142 274.2)
-
Step 500
500
#6A7BF4
oklch(63% 0.18 274)
-
Step 600
600
#5461E3
oklch(55.6% 0.195 273.9)
-
Step 700
700 (this color)
#3F47BD
oklch(46.6% 0.182 273.9)
-
Step 800
800
#3842A0
oklch(42.8% 0.151 273.6)
-
Step 900
900
#30397F
oklch(37.8% 0.118 273.9)
-
Step 950
950
#1C224A
oklch(27% 0.074 274)
#3F47BD 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) | #005BC1 | 0.057 |
| Deuteranopia (no green cones) | #0050BB | 0.046 |
| Tritanopia (no blue cones) | #00657B | 0.150 |
| Achromatopsia (no color) | #565656 | 0.183 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F47BD
#3F47BD
oklch(46.6% 0.182 273.9)
- #6B5800
#6B5800
oklch(46.6% 0.096 94.4)
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 #3F47BD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Majorelle Blue #3F37C9 ΔE 0.037
- Blue With A Hint Of Purple #533CC6 ΔE 0.037
- Blue Blue #2242C7 ΔE 0.039
- Blurple #5539CC ΔE 0.045
- Bluey Purple #6241C7 ΔE 0.056
- Sapphire #2138AB ΔE 0.062
- Warm Blue #4B57DB ΔE 0.063
- Blueberry #464196 ΔE 0.064
Use #3F47BD 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.