#3F48D6
Closest named color: Warm Blue (#4B57DB). oklch(49% 0.213 272.7), rgb(63, 72, 214).
Aa
White text reads best on this color (6.75:1).
About this color
#3F48D6 is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.213 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.039 away. White text reads best on it, at 6.75:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.213) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.10:1 |
| White text | 6.75:1 |
Values
| HEX | #3F48D6 |
| RGB | rgb(63, 72, 214) |
| HSL | hsl(236, 65%, 54%) |
| OKLCH | oklch(49% 0.213 272.7) |
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 #3F48D6 | 6.75:1 | AA | Lc -87.6 | Fine for body text |
| Black text on #3F48D6 | 3.10:1 | AA large text | Lc 21.5 | Dividers and decoration only |
| #3F48D6 text on white | 6.75:1 | AA | Lc 82.6 | Fine for body text |
| #3F48D6 text on black | 3.10:1 | AA large text | Lc -19.4 | 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
#E3E9FF
oklch(93.6% 0.03 273.6)
-
Step 200
200
#CCD8FF
oklch(88.6% 0.055 271.8)
-
Step 300
300
#ACBDFF
oklch(80.9% 0.095 273)
-
Step 400
400
#8198FF
oklch(70.7% 0.153 272.5)
-
Step 500
500
#6479FF
oklch(63% 0.199 272.7)
-
Step 600
600
#4D5AF6
oklch(55.6% 0.23 272.6)
-
Step 700
700 (this color)
#3F48D6
oklch(49% 0.213 272.7)
-
Step 800
800
#343DAD
oklch(42.7% 0.176 272.8)
-
Step 900
900
#2C3689
oklch(37.7% 0.137 272.7)
-
Step 950
950
#192050
oklch(26.9% 0.088 272.8)
#3F48D6 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) | #0062DA | 0.063 |
| Deuteranopia (no green cones) | #0054D3 | 0.044 |
| Tritanopia (no blue cones) | #006E89 | 0.170 |
| Achromatopsia (no color) | #5B5B5B | 0.214 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F48D6
#3F48D6
oklch(49% 0.213 272.7)
- #745E00
#745E00
oklch(49% 0.1 92.9)
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 #3F48D6, closest first.
No curated palette has a color within ΔE 0.04 of #3F48D6.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.039
- Majorelle Blue #3F37C9 ΔE 0.040
- Blurple #5539CC ΔE 0.043
- Blue With A Hint Of Purple #533CC6 ΔE 0.043
- Blue Blue #2242C7 ΔE 0.044
- Purpley Blue #5F34E7 ΔE 0.058
- Bluey Purple #6241C7 ΔE 0.058
- Azul #1D5DEC ΔE 0.059
Use #3F48D6 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.