#3F5EE2
Closest named color: Neon Blue (#4361EE). oklch(53.9% 0.203 268.5), rgb(63, 94, 226).
Aa
White text reads best on this color (5.36:1).
About this color
#3F5EE2 is a medium-dark, vivid blue. In OKLCH its lightness is 54%, its chroma 0.203 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Neon Blue (#4361EE), ΔE 0.020 away. White text reads best on it, at 5.36:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.203) |
| Temperature | cool |
| Nearest name | Neon Blue (#4361EE) |
| Black text | 3.91:1 |
| White text | 5.36:1 |
Values
| HEX | #3F5EE2 |
| RGB | rgb(63, 94, 226) |
| HSL | hsl(229, 74%, 57%) |
| OKLCH | oklch(53.9% 0.203 268.5) |
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 #3F5EE2 | 5.36:1 | AA | Lc -81.5 | Fine for body text |
| Black text on #3F5EE2 | 3.91:1 | AA large text | Lc 27.9 | Dividers and decoration only |
| #3F5EE2 text on white | 5.36:1 | AA | Lc 76.2 | Fine for body text |
| #3F5EE2 text on black | 3.91:1 | AA large text | Lc -25.5 | 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 600.
-
Step 50
50
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E2EAFC
oklch(93.6% 0.026 266.6)
-
Step 200
200
#CBD9FC
oklch(88.6% 0.051 268.1)
-
Step 300
300
#A8BFFD
oklch(81% 0.092 268.6)
-
Step 400
400
#7A9BFC
oklch(70.7% 0.147 268.3)
-
Step 500
500
#5B7EF9
oklch(63.1% 0.187 268.6)
-
Step 600
600 (this color)
#3F5EE2
oklch(53.9% 0.203 268.5)
-
Step 700
700
#3651CA
oklch(49% 0.19 268.7)
-
Step 800
800
#2C44A3
oklch(42.8% 0.156 268.2)
-
Step 900
900
#273A81
oklch(37.6% 0.122 268.6)
-
Step 950
950
#17234C
oklch(27.1% 0.077 268.6)
#3F5EE2 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) | #0072E6 | 0.052 |
| Deuteranopia (no green cones) | #0063DF | 0.035 |
| Tritanopia (no blue cones) | #007F97 | 0.162 |
| Achromatopsia (no color) | #6A6A6A | 0.204 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F5EE2
#3F5EE2
oklch(53.9% 0.203 268.5)
- #886A00
#886A00
oklch(53.9% 0.11 89.1)
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 #3F5EE2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Neon Blue #4361EE ΔE 0.020
- Warm Blue #4B57DB ΔE 0.021
- Royal Blue #4169E1 ΔE 0.027
- Azul #1D5DEC ΔE 0.030
- Cerulean Blue #056EEE ΔE 0.046
- Bright Blue #0165FC ΔE 0.050
- Dark Periwinkle #665FD1 ΔE 0.056
- Iris #6258C4 ΔE 0.063
Use #3F5EE2 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.