#3F39EC
Closest named color: Light Royal Blue (#3A2EFE). oklch(49% 0.254 273.2), rgb(63, 57, 236).
Aa
White text reads best on this color (6.98:1).
About this color
#3F39EC is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.254 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Light Royal Blue (#3A2EFE), ΔE 0.031 away. White text reads best on it, at 6.98:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.254) |
| Temperature | cool |
| Nearest name | Light Royal Blue (#3A2EFE) |
| Black text | 3.00:1 |
| White text | 6.98:1 |
Values
| HEX | #3F39EC |
| RGB | rgb(63, 57, 236) |
| HSL | hsl(242, 82%, 57%) |
| OKLCH | oklch(49% 0.254 273.2) |
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 #3F39EC | 6.98:1 | AA | Lc -88.0 | Fine for body text |
| Black text on #3F39EC | 3.00:1 | AA large text | Lc 21.1 | Dividers and decoration only |
| #3F39EC text on white | 6.98:1 | AA | Lc 83.0 | Fine for body text |
| #3F39EC text on black | 3.00:1 | AA large text | Lc -19.0 | 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
#CDD7FF
oklch(88.4% 0.056 274.2)
-
Step 300
300
#ACBDFF
oklch(80.9% 0.095 273)
-
Step 400
400
#8297FF
oklch(70.6% 0.154 273.2)
-
Step 500
500
#6679FF
oklch(63.1% 0.198 273.3)
-
Step 600
600
#4E55FF
oklch(55.6% 0.246 273.3)
-
Step 700
700 (this color)
#3F39EC
oklch(49% 0.254 273.2)
-
Step 800
800
#3332BF
oklch(42.7% 0.211 273.2)
-
Step 900
900
#2B3096
oklch(37.8% 0.163 273.3)
-
Step 950
950
#181E58
oklch(27.1% 0.104 272.8)
#3F39EC 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) | #0062F1 | 0.080 |
| Deuteranopia (no green cones) | #0050E9 | 0.051 |
| Tritanopia (no blue cones) | #006F91 | 0.198 |
| Achromatopsia (no color) | #595959 | 0.256 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F39EC
#3F39EC
oklch(49% 0.254 273.2)
- #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 #3F39EC, closest first.
No curated palette has a color within ΔE 0.04 of #3F39EC.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Royal Blue #3A2EFE ΔE 0.031
- Vibrant Blue #0339F8 ΔE 0.049
- Purpley Blue #5F34E7 ΔE 0.050
- Vivid Blue #152EFF ΔE 0.053
- Blue Purple #5A06EF ΔE 0.055
- Majorelle Blue #3F37C9 ΔE 0.056
- Electric Blue #0652FF ΔE 0.060
- Blurple #5539CC ΔE 0.061
Use #3F39EC 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.