#3F44BB
Closest named color: Majorelle Blue (#3F37C9). oklch(45.9% 0.183 274.7), rgb(63, 68, 187).
Aa
White text reads best on this color (7.62:1).
About this color
#3F44BB is a medium-dark, vivid blue. In OKLCH its lightness is 46%, its chroma 0.183 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Majorelle Blue (#3F37C9), ΔE 0.033 away. White text reads best on it, at 7.62:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | vivid (0.183) |
| Temperature | cool |
| Nearest name | Majorelle Blue (#3F37C9) |
| Black text | 2.75:1 |
| White text | 7.62:1 |
Values
| HEX | #3F44BB |
| RGB | rgb(63, 68, 187) |
| HSL | hsl(238, 50%, 49%) |
| OKLCH | oklch(45.9% 0.183 274.7) |
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 #3F44BB | 7.62:1 | AAA | Lc -90.7 | Preferred for body text |
| Black text on #3F44BB | 2.75:1 | Fails | Lc 18.1 | Dividers and decoration only |
| #3F44BB text on white | 7.62:1 | AAA | Lc 85.9 | Fine for body text |
| #3F44BB text on black | 2.75:1 | Fails | Lc -16.1 | 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
#CFD7FA
oklch(88.4% 0.049 275.2)
-
Step 300
300
#AFBDFA
oklch(80.9% 0.088 274.3)
-
Step 400
400
#8798F8
oklch(70.7% 0.141 274.6)
-
Step 500
500
#6C7BF5
oklch(63.2% 0.181 274.7)
-
Step 600
600
#5660E4
oklch(55.7% 0.197 274.7)
-
Step 700
700 (this color)
#3F44BB
oklch(45.9% 0.183 274.7)
-
Step 800
800
#3A41A0
oklch(42.7% 0.152 274.8)
-
Step 900
900
#31387F
oklch(37.7% 0.119 274.9)
-
Step 950
950
#1C224A
oklch(27% 0.074 274)
#3F44BB 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) | #0059BF | 0.059 |
| Deuteranopia (no green cones) | #004EB9 | 0.048 |
| Tritanopia (no blue cones) | #006279 | 0.149 |
| Achromatopsia (no color) | #545454 | 0.184 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F44BB
#3F44BB
oklch(45.9% 0.183 274.7)
- #695600
#695600
oklch(45.9% 0.094 94)
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 #3F44BB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Majorelle Blue #3F37C9 ΔE 0.033
- Blue With A Hint Of Purple #533CC6 ΔE 0.036
- Blue Blue #2242C7 ΔE 0.038
- Blurple #5539CC ΔE 0.045
- Sapphire #2138AB ΔE 0.056
- Bluey Purple #6241C7 ΔE 0.057
- Blueberry #464196 ΔE 0.060
- Warm Blue #4B57DB ΔE 0.070
Use #3F44BB 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.