#505EE4
Closest named color: Neon Blue (#4361EE). oklch(54.9% 0.201 273.3), rgb(80, 94, 228).
Aa
White text reads best on this color (5.16:1).
About this color
#505EE4 is a medium-dark, vivid blue. In OKLCH its lightness is 55%, its chroma 0.201 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Neon Blue (#4361EE), ΔE 0.021 away. White text reads best on it, at 5.16:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.201) |
| Temperature | cool |
| Nearest name | Neon Blue (#4361EE) |
| Black text | 4.06:1 |
| White text | 5.16:1 |
Values
| HEX | #505EE4 |
| RGB | rgb(80, 94, 228) |
| HSL | hsl(234, 73%, 60%) |
| OKLCH | oklch(54.9% 0.201 273.3) |
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 #505EE4 | 5.16:1 | AA | Lc -80.5 | Fine for body text |
| Black text on #505EE4 | 4.06:1 | AA large text | Lc 29.0 | Dividers and decoration only |
| #505EE4 text on white | 5.16:1 | AA | Lc 75.1 | Fine for body text |
| #505EE4 text on black | 4.06:1 | AA large text | Lc -26.6 | 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
#F3F5FE
oklch(97.1% 0.012 276.1)
-
Step 100
100
#E4E9FC
oklch(93.6% 0.026 274.1)
-
Step 200
200
#CED8FB
oklch(88.6% 0.049 272.8)
-
Step 300
300
#ADBDFC
oklch(80.9% 0.091 273.2)
-
Step 400
400
#8498FA
oklch(70.7% 0.145 273.4)
-
Step 500
500
#687BF7
oklch(63.1% 0.185 273.4)
-
Step 600
600 (this color)
#505EE4
oklch(54.9% 0.201 273.3)
-
Step 700
700
#434EC8
oklch(49% 0.187 273.3)
-
Step 800
800
#3741A2
oklch(42.7% 0.155 273.4)
-
Step 900
900
#2F3880
oklch(37.6% 0.121 273.7)
-
Step 950
950
#1B224B
oklch(27% 0.076 273)
#505EE4 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) | #0074E8 | 0.064 |
| Deuteranopia (no green cones) | #0067E1 | 0.053 |
| Tritanopia (no blue cones) | #007F98 | 0.166 |
| Achromatopsia (no color) | #6D6D6D | 0.202 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #505EE4
#505EE4
oklch(54.9% 0.201 273.3)
- #886F00
#886F00
oklch(55% 0.113 93.2)
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 #505EE4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Neon Blue #4361EE ΔE 0.021
- Warm Blue #4B57DB ΔE 0.023
- Royal Blue #4169E1 ΔE 0.029
- Dark Periwinkle #665FD1 ΔE 0.042
- Azul #1D5DEC ΔE 0.048
- Slate Blue #6A5ACD ΔE 0.050
- Light Indigo #6D5ACF ΔE 0.052
- Iris #6258C4 ΔE 0.055
Use #505EE4 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.