#505BBE
Closest named color: Iris (#6258C4). oklch(51.5% 0.154 274.9), rgb(80, 91, 190).
Aa
White text reads best on this color (5.86:1).
About this color
#505BBE is a medium-dark, vivid blue. In OKLCH its lightness is 52%, its chroma 0.154 and its hue 275°. 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 5.86:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.154) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.58:1 |
| White text | 5.86:1 |
Values
| HEX | #505BBE |
| RGB | rgb(80, 91, 190) |
| HSL | hsl(234, 46%, 53%) |
| OKLCH | oklch(51.5% 0.154 274.9) |
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 #505BBE | 5.86:1 | AA | Lc -84.3 | Fine for body text |
| Black text on #505BBE | 3.58:1 | AA large text | Lc 25.0 | Dividers and decoration only |
| #505BBE text on white | 5.86:1 | AA | Lc 79.1 | Fine for body text |
| #505BBE text on black | 3.58:1 | AA large text | Lc -22.7 | 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 700.
-
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
#D1D8F5
oklch(88.6% 0.041 274.8)
-
Step 300
300
#B2BDF1
oklch(80.8% 0.075 275.3)
-
Step 400
400
#8B9AEB
oklch(70.7% 0.12 274.9)
-
Step 500
500
#707FE4
oklch(63.2% 0.152 274.9)
-
Step 600
600
#5966D2
oklch(55.6% 0.165 274.6)
-
Step 700
700 (this color)
#505BBE
oklch(51.5% 0.154 274.9)
-
Step 800
800
#3C4593
oklch(42.6% 0.127 274.7)
-
Step 900
900
#333B75
oklch(37.7% 0.099 274.8)
-
Step 950
950
#1E2345
oklch(27.1% 0.063 275.1)
#505BBE 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) | #2369C1 | 0.051 |
| Deuteranopia (no green cones) | #0760BC | 0.057 |
| Tritanopia (no blue cones) | #027284 | 0.136 |
| Achromatopsia (no color) | #656565 | 0.154 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #505BBE
#505BBE
oklch(51.5% 0.154 274.9)
- #7B6600
#7B6600
oklch(51.5% 0.106 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 #505BBE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.028
- Slate Blue #6A5ACD ΔE 0.045
- Dark Periwinkle #665FD1 ΔE 0.045
- Warm Blue #4B57DB ΔE 0.047
- Light Indigo #6D5ACF ΔE 0.051
- French Blue #436BAD ΔE 0.055
- Mid Blue #276AB3 ΔE 0.057
- Royal Blue #4169E1 ΔE 0.062
Use #505BBE 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.