#555FE5
Closest named color: Neon Blue (#4361EE). oklch(55.5% 0.2 274.6), rgb(85, 95, 229).
Aa
White text reads best on this color (5.05:1).
About this color
#555FE5 is a medium-dark, vivid blue. In OKLCH its lightness is 55%, its chroma 0.200 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Neon Blue (#4361EE), ΔE 0.024 away. White text reads best on it, at 5.05:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.200) |
| Temperature | cool |
| Nearest name | Neon Blue (#4361EE) |
| Black text | 4.15:1 |
| White text | 5.05:1 |
Values
| HEX | #555FE5 |
| RGB | rgb(85, 95, 229) |
| HSL | hsl(236, 73%, 62%) |
| OKLCH | oklch(55.5% 0.2 274.6) |
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 #555FE5 | 5.05:1 | AA | Lc -79.9 | Fine for body text |
| Black text on #555FE5 | 4.15:1 | AA large text | Lc 29.6 | Dividers and decoration only |
| #555FE5 text on white | 5.05:1 | AA | Lc 74.5 | Content text, not long reading |
| #555FE5 text on black | 4.15:1 | AA large text | Lc -27.3 | 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
#CFD7FB
oklch(88.5% 0.05 275.4)
-
Step 300
300
#AFBDFB
oklch(81% 0.089 274.4)
-
Step 400
400
#8698FA
oklch(70.8% 0.144 274.3)
-
Step 500
500
#6B7AF7
oklch(63.1% 0.185 274.7)
-
Step 600
600 (this color)
#555FE5
oklch(55.5% 0.2 274.6)
-
Step 700
700
#464EC7
oklch(49.1% 0.185 274.4)
-
Step 800
800
#3941A1
oklch(42.8% 0.153 274.3)
-
Step 900
900
#303880
oklch(37.7% 0.12 274.3)
-
Step 950
950
#1C214B
oklch(26.9% 0.077 274.9)
#555FE5 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) | #0075E9 | 0.068 |
| Deuteranopia (no green cones) | #0068E2 | 0.059 |
| Tritanopia (no blue cones) | #008099 | 0.168 |
| Achromatopsia (no color) | #6F6F6F | 0.201 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #555FE5
#555FE5
oklch(55.5% 0.2 274.6)
- #887100
#887100
oklch(55.4% 0.114 94.8)
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 #555FE5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Neon Blue #4361EE ΔE 0.024
- Warm Blue #4B57DB ΔE 0.029
- Royal Blue #4169E1 ΔE 0.031
- Dark Periwinkle #665FD1 ΔE 0.039
- Slate Blue #6A5ACD ΔE 0.047
- Light Indigo #6D5ACF ΔE 0.048
- Azul #1D5DEC ΔE 0.054
- Iris #6258C4 ΔE 0.054
Use #555FE5 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.