#3F5FE0
Closest named color: Warm Blue (#4B57DB). oklch(53.9% 0.199 268.3), rgb(63, 95, 224).
Aa
White text reads best on this color (5.35:1).
About this color
#3F5FE0 is a medium-dark, vivid blue. In OKLCH its lightness is 54%, its chroma 0.199 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.022 away. White text reads best on it, at 5.35:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.199) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.92:1 |
| White text | 5.35:1 |
Values
| HEX | #3F5FE0 |
| RGB | rgb(63, 95, 224) |
| HSL | hsl(228, 72%, 56%) |
| OKLCH | oklch(53.9% 0.199 268.3) |
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 #3F5FE0 | 5.35:1 | AA | Lc -81.5 | Fine for body text |
| Black text on #3F5FE0 | 3.92:1 | AA large text | Lc 28.0 | Dividers and decoration only |
| #3F5FE0 text on white | 5.35:1 | AA | Lc 76.1 | Fine for body text |
| #3F5FE0 text on black | 3.92:1 | AA large text | Lc -25.6 | 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
#CBD9FB
oklch(88.6% 0.049 267.7)
-
Step 300
300
#A8BFFC
oklch(80.9% 0.09 268.4)
-
Step 400
400
#7B9BFA
oklch(70.7% 0.144 268.5)
-
Step 500
500
#5B7FF7
oklch(63.1% 0.183 268.2)
-
Step 600
600 (this color)
#3F5FE0
oklch(53.9% 0.199 268.3)
-
Step 700
700
#3652C8
oklch(49.1% 0.186 268.4)
-
Step 800
800
#2C44A2
oklch(42.7% 0.155 268.2)
-
Step 900
900
#273B80
oklch(37.7% 0.119 268.1)
-
Step 950
950
#17234B
oklch(27% 0.076 268.4)
#3F5FE0 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) | #0072E4 | 0.050 |
| Deuteranopia (no green cones) | #0064DD | 0.035 |
| Tritanopia (no blue cones) | #007F96 | 0.159 |
| Achromatopsia (no color) | #6B6B6B | 0.200 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F5FE0
#3F5FE0
oklch(53.9% 0.199 268.3)
- #896A00
#896A00
oklch(54% 0.11 88.4)
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 #3F5FE0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.022
- Neon Blue #4361EE ΔE 0.023
- Royal Blue #4169E1 ΔE 0.025
- Azul #1D5DEC ΔE 0.033
- Cerulean Blue #056EEE ΔE 0.045
- Bright Blue #0165FC ΔE 0.052
- Dark Periwinkle #665FD1 ΔE 0.055
- Iris #6258C4 ΔE 0.061
Use #3F5FE0 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.