#545CEF
Closest named color: Neon Blue (#4361EE). oklch(55.7% 0.217 274.5), rgb(84, 92, 239).
Aa
White text reads best on this color (5.05:1).
About this color
#545CEF is a medium-dark, vivid blue. In OKLCH its lightness is 56%, its chroma 0.217 and its hue 275°. 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 5.05:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.217) |
| Temperature | cool |
| Nearest name | Neon Blue (#4361EE) |
| Black text | 4.15:1 |
| White text | 5.05:1 |
Values
| HEX | #545CEF |
| RGB | rgb(84, 92, 239) |
| HSL | hsl(237, 83%, 63%) |
| OKLCH | oklch(55.7% 0.217 274.5) |
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 #545CEF | 5.05:1 | AA | Lc -79.8 | Fine for body text |
| Black text on #545CEF | 4.15:1 | AA large text | Lc 29.7 | Dividers and decoration only |
| #545CEF text on white | 5.05:1 | AA | Lc 74.4 | Content text, not long reading |
| #545CEF 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
#F3F5FF
oklch(97.2% 0.013 277.1)
-
Step 100
100
#E4E9FD
oklch(93.6% 0.028 274.7)
-
Step 200
200
#CED7FE
oklch(88.5% 0.055 275)
-
Step 300
300
#AEBCFF
oklch(80.9% 0.096 274.9)
-
Step 400
400
#8597FF
oklch(70.8% 0.153 274.4)
-
Step 500
500
#6978FF
oklch(63.1% 0.199 274.4)
-
Step 600
600 (this color)
#545CEF
oklch(55.7% 0.217 274.5)
-
Step 700
700
#454AD0
oklch(49.1% 0.202 274.5)
-
Step 800
800
#383EA8
oklch(42.7% 0.167 274.4)
-
Step 900
900
#2F3685
oklch(37.6% 0.131 274.4)
-
Step 950
950
#1B214E
oklch(27.1% 0.082 273.9)
#545CEF 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) | #0076F4 | 0.071 |
| Deuteranopia (no green cones) | #0068EC | 0.058 |
| Tritanopia (no blue cones) | #00819D | 0.178 |
| Achromatopsia (no color) | #6F6F6F | 0.217 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #545CEF
#545CEF
oklch(55.7% 0.217 274.5)
- #897200
#897200
oklch(55.8% 0.114 94.9)
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 #545CEF, 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 0.035
- Royal Blue #4169E1 ΔE 0.041
- Azul #1D5DEC ΔE 0.051
- Dark Periwinkle #665FD1 ΔE 0.053
- Bright Blue #0165FC ΔE 0.058
- Slate Blue #6A5ACD ΔE 0.060
- Light Indigo #6D5ACF ΔE 0.060
Use #545CEF 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.