#3F50BD
Closest named color: Blue With A Hint Of Purple (#533CC6). oklch(48.3% 0.171 271.7), rgb(63, 80, 189).
Aa
White text reads best on this color (6.78:1).
About this color
#3F50BD is a medium-dark, vivid blue. In OKLCH its lightness is 48%, its chroma 0.171 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Blue With A Hint Of Purple (#533CC6), ΔE 0.050 away. White text reads best on it, at 6.78:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.171) |
| Temperature | cool |
| Nearest name | Blue With A Hint Of Purple (#533CC6) |
| Black text | 3.09:1 |
| White text | 6.78:1 |
Values
| HEX | #3F50BD |
| RGB | rgb(63, 80, 189) |
| HSL | hsl(232, 50%, 49%) |
| OKLCH | oklch(48.3% 0.171 271.7) |
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 #3F50BD | 6.78:1 | AA | Lc -88.0 | Fine for body text |
| Black text on #3F50BD | 3.09:1 | AA large text | Lc 21.1 | Dividers and decoration only |
| #3F50BD text on white | 6.78:1 | AA | Lc 83.0 | Fine for body text |
| #3F50BD text on black | 3.09:1 | AA large text | Lc -18.9 | 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
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E4E9FB
oklch(93.6% 0.025 273.5)
-
Step 200
200
#CED8F8
oklch(88.5% 0.045 271.7)
-
Step 300
300
#ADBEF7
oklch(80.9% 0.083 271.6)
-
Step 400
400
#839AF3
oklch(70.6% 0.133 271.7)
-
Step 500
500
#667EEF
oklch(63% 0.171 271.7)
-
Step 600
600
#5065DD
oklch(55.7% 0.184 271.6)
-
Step 700
700 (this color)
#3F50BD
oklch(48.3% 0.171 271.7)
-
Step 800
800
#35449B
oklch(42.6% 0.142 271.6)
-
Step 900
900
#2E3B7B
oklch(37.8% 0.109 271.6)
-
Step 950
950
#1B2348
oklch(27% 0.069 271.9)
#3F50BD 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) | #0061C1 | 0.052 |
| Deuteranopia (no green cones) | #0056BB | 0.043 |
| Tritanopia (no blue cones) | #006B7E | 0.142 |
| Achromatopsia (no color) | #5B5B5B | 0.172 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F50BD
#3F50BD
oklch(48.3% 0.171 271.7)
- #735C00
#735C00
oklch(48.4% 0.099 91.8)
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 #3F50BD, 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 0.050
- Blue Blue #2242C7 ΔE 0.051
- Warm Blue #4B57DB ΔE 0.053
- Majorelle Blue #3F37C9 ΔE 0.056
- Iris #6258C4 ΔE 0.057
- Blurple #5539CC ΔE 0.058
- Bluey Purple #6241C7 ΔE 0.060
- Blueberry #464196 ΔE 0.070
Use #3F50BD 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.