#505DCA
Closest named color: Iris (#6258C4). oklch(52.8% 0.168 274), rgb(80, 93, 202).
Aa
White text reads best on this color (5.58:1).
About this color
#505DCA is a medium-dark, vivid blue. In OKLCH its lightness is 53%, its chroma 0.168 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.028 away. White text reads best on it, at 5.58:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.168) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.75:1 |
| White text | 5.58:1 |
Values
| HEX | #505DCA |
| RGB | rgb(80, 93, 202) |
| HSL | hsl(234, 54%, 55%) |
| OKLCH | oklch(52.8% 0.168 274) |
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 #505DCA | 5.58:1 | AA | Lc -82.9 | Fine for body text |
| Black text on #505DCA | 3.75:1 | AA large text | Lc 26.5 | Dividers and decoration only |
| #505DCA text on white | 5.58:1 | AA | Lc 77.6 | Fine for body text |
| #505DCA text on black | 3.75:1 | AA large text | Lc -24.2 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E5E9F9
oklch(93.6% 0.022 274.7)
-
Step 200
200
#D0D8F6
oklch(88.6% 0.042 273.7)
-
Step 300
300
#B1BEF2
oklch(81% 0.075 273.7)
-
Step 400
400
#899AEC
oklch(70.7% 0.122 274)
-
Step 500
500
#6E7FE6
oklch(63.2% 0.155 274.1)
-
Step 600
600 (this color)
#505DCA
oklch(52.8% 0.168 274)
-
Step 700
700
#4854B7
oklch(49.1% 0.155 274)
-
Step 800
800
#3B4594
oklch(42.6% 0.129 274.2)
-
Step 900
900
#323B76
oklch(37.7% 0.1 274.1)
-
Step 950
950
#1D2345
oklch(27% 0.063 273.9)
#505DCA 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) | #136DCE | 0.057 |
| Deuteranopia (no green cones) | #0063C8 | 0.056 |
| Tritanopia (no blue cones) | #00768A | 0.144 |
| Achromatopsia (no color) | #686868 | 0.168 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #505DCA
#505DCA
oklch(52.8% 0.168 274)
- #806900
#806900
oklch(52.8% 0.108 93.8)
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 #505DCA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.028
- Warm Blue #4B57DB ΔE 0.031
- Dark Periwinkle #665FD1 ΔE 0.034
- Slate Blue #6A5ACD ΔE 0.038
- Light Indigo #6D5ACF ΔE 0.043
- Royal Blue #4169E1 ΔE 0.045
- Neon Blue #4361EE ΔE 0.057
- French Blue #436BAD ΔE 0.064
Use #505DCA 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.