#505ACD
Closest named color: Warm Blue (#4B57DB). oklch(52.4% 0.176 274.8), rgb(80, 90, 205).
Aa
White text reads best on this color (5.69:1).
About this color
#505ACD is a medium-dark, vivid blue. In OKLCH its lightness is 52%, its chroma 0.176 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.024 away. White text reads best on it, at 5.69:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.176) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.68:1 |
| White text | 5.69:1 |
Values
| HEX | #505ACD |
| RGB | rgb(80, 90, 205) |
| HSL | hsl(235, 56%, 56%) |
| OKLCH | oklch(52.4% 0.176 274.8) |
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 #505ACD | 5.69:1 | AA | Lc -83.4 | Fine for body text |
| Black text on #505ACD | 3.68:1 | AA large text | Lc 25.9 | Dividers and decoration only |
| #505ACD text on white | 5.69:1 | AA | Lc 78.1 | Fine for body text |
| #505ACD text on black | 3.68:1 | AA large text | Lc -23.6 | 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
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E5E9FA
oklch(93.6% 0.023 275.4)
-
Step 200
200
#D0D8F7
oklch(88.6% 0.044 274)
-
Step 300
300
#B1BDF4
oklch(80.8% 0.079 274.9)
-
Step 400
400
#8A99EF
oklch(70.7% 0.127 275.2)
-
Step 500
500
#6E7DEA
oklch(63% 0.163 274.8)
-
Step 600
600 (this color)
#505ACD
oklch(52.4% 0.176 274.8)
-
Step 700
700
#4952BB
oklch(49.1% 0.163 275)
-
Step 800
800
#3B4497
oklch(42.7% 0.135 274.5)
-
Step 900
900
#323A78
oklch(37.6% 0.105 274.7)
-
Step 950
950
#1D2347
oklch(27.1% 0.067 274)
#505ACD 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) | #006CD1 | 0.063 |
| Deuteranopia (no green cones) | #0061CB | 0.057 |
| Tritanopia (no blue cones) | #00758B | 0.149 |
| Achromatopsia (no color) | #676767 | 0.176 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #505ACD
#505ACD
oklch(52.4% 0.176 274.8)
- #7E6800
#7E6800
oklch(52.3% 0.107 94.3)
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 #505ACD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.024
- Iris #6258C4 ΔE 0.029
- Dark Periwinkle #665FD1 ΔE 0.036
- Slate Blue #6A5ACD ΔE 0.038
- Light Indigo #6D5ACF ΔE 0.043
- Royal Blue #4169E1 ΔE 0.046
- Neon Blue #4361EE ΔE 0.053
- Bluey Purple #6241C7 ΔE 0.058
Use #505ACD 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.