#5558EA
Closest named color: Neon Blue (#4361EE). oklch(54.7% 0.215 275.7), rgb(85, 88, 234).
Aa
White text reads best on this color (5.28:1).
About this color
#5558EA is a medium-dark, vivid blue. In OKLCH its lightness is 55%, its chroma 0.215 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Neon Blue (#4361EE), ΔE 0.027 away. White text reads best on it, at 5.28:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.215) |
| Temperature | cool |
| Nearest name | Neon Blue (#4361EE) |
| Black text | 3.97:1 |
| White text | 5.28:1 |
Values
| HEX | #5558EA |
| RGB | rgb(85, 88, 234) |
| HSL | hsl(239, 78%, 63%) |
| OKLCH | oklch(54.7% 0.215 275.7) |
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 #5558EA | 5.28:1 | AA | Lc -81.1 | Fine for body text |
| Black text on #5558EA | 3.97:1 | AA large text | Lc 28.3 | Dividers and decoration only |
| #5558EA text on white | 5.28:1 | AA | Lc 75.7 | Fine for body text |
| #5558EA text on black | 3.97:1 | AA large text | Lc -26.0 | 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 600.
-
Step 50
50
#F3F5FE
oklch(97.1% 0.012 276.1)
-
Step 100
100
#E4E9FD
oklch(93.6% 0.028 274.7)
-
Step 200
200
#CFD7FD
oklch(88.5% 0.053 275.9)
-
Step 300
300
#AFBCFF
oklch(80.9% 0.096 275.6)
-
Step 400
400
#8796FF
oklch(70.7% 0.154 275.6)
-
Step 500
500
#6C77FE
oklch(63.1% 0.198 275.7)
-
Step 600
600 (this color)
#5558EA
oklch(54.7% 0.215 275.7)
-
Step 700
700
#4849CE
oklch(49% 0.2 275.8)
-
Step 800
800
#3B3DA7
oklch(42.7% 0.166 275.9)
-
Step 900
900
#313684
oklch(37.7% 0.129 275.5)
-
Step 950
950
#1D204D
oklch(26.9% 0.082 276.5)
#5558EA 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) | #0072EF | 0.073 |
| Deuteranopia (no green cones) | #0065E7 | 0.062 |
| Tritanopia (no blue cones) | #007D99 | 0.178 |
| Achromatopsia (no color) | #6C6C6C | 0.216 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5558EA
#5558EA
oklch(54.7% 0.215 275.7)
- #856F00
#856F00
oklch(54.7% 0.112 95.2)
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 #5558EA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Neon Blue #4361EE ΔE 0.027
- Warm Blue #4B57DB ΔE 0.027
- Royal Blue #4169E1 ΔE 0.044
- Dark Periwinkle #665FD1 ΔE 0.050
- Azul #1D5DEC ΔE 0.052
- Slate Blue #6A5ACD ΔE 0.055
- Light Indigo #6D5ACF ΔE 0.055
- Iris #6258C4 ΔE 0.061
Use #5558EA 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.