#555CE6
Closest named color: Neon Blue (#4361EE). oklch(55% 0.205 275.2), rgb(85, 92, 230).
Aa
White text reads best on this color (5.17:1).
About this color
#555CE6 is a medium-dark, vivid blue. In OKLCH its lightness is 55%, its chroma 0.205 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Neon Blue (#4361EE), ΔE 0.025 away. White text reads best on it, at 5.17:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.205) |
| Temperature | cool |
| Nearest name | Neon Blue (#4361EE) |
| Black text | 4.05:1 |
| White text | 5.17:1 |
Values
| HEX | #555CE6 |
| RGB | rgb(85, 92, 230) |
| HSL | hsl(237, 74%, 62%) |
| OKLCH | oklch(55% 0.205 275.2) |
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 #555CE6 | 5.17:1 | AA | Lc -80.5 | Fine for body text |
| Black text on #555CE6 | 4.05:1 | AA large text | Lc 29.0 | Dividers and decoration only |
| #555CE6 text on white | 5.17:1 | AA | Lc 75.1 | Fine for body text |
| #555CE6 text on black | 4.05:1 | 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
#CFD7FC
oklch(88.5% 0.052 275.7)
-
Step 300
300
#AFBCFD
oklch(80.9% 0.093 275.4)
-
Step 400
400
#8797FB
oklch(70.7% 0.147 275.1)
-
Step 500
500
#6C79F9
oklch(63.1% 0.189 275.2)
-
Step 600
600 (this color)
#555CE6
oklch(55% 0.205 275.2)
-
Step 700
700
#474CCA
oklch(49.1% 0.191 275.1)
-
Step 800
800
#3A3FA3
oklch(42.6% 0.158 275.2)
-
Step 900
900
#313781
oklch(37.6% 0.123 275.3)
-
Step 950
950
#1C214C
oklch(27% 0.079 274.8)
#555CE6 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) | #0074EB | 0.071 |
| Deuteranopia (no green cones) | #0067E3 | 0.060 |
| Tritanopia (no blue cones) | #007E98 | 0.171 |
| Achromatopsia (no color) | #6D6D6D | 0.206 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #555CE6
#555CE6
oklch(55% 0.205 275.2)
- #867000
#867000
oklch(55% 0.113 95.3)
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 #555CE6, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Neon Blue #4361EE ΔE 0.025
- Warm Blue #4B57DB ΔE 0.025
- Royal Blue #4169E1 ΔE 0.036
- Dark Periwinkle #665FD1 ΔE 0.041
- Slate Blue #6A5ACD ΔE 0.048
- Light Indigo #6D5ACF ΔE 0.049
- Azul #1D5DEC ΔE 0.053
- Iris #6258C4 ΔE 0.055
Use #555CE6 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.