#5665D5
Closest named color: Dark Periwinkle (#665FD1). oklch(55.5% 0.171 273.7), rgb(86, 101, 213).
Aa
White text reads best on this color (4.97:1).
About this color
#5665D5 is a medium-dark, vivid blue. In OKLCH its lightness is 55%, its chroma 0.171 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Periwinkle (#665FD1), ΔE 0.025 away. White text reads best on it, at 4.97:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.171) |
| Temperature | cool |
| Nearest name | Dark Periwinkle (#665FD1) |
| Black text | 4.21:1 |
| White text | 4.97:1 |
Values
| HEX | #5665D5 |
| RGB | rgb(86, 101, 213) |
| HSL | hsl(233, 60%, 59%) |
| OKLCH | oklch(55.5% 0.171 273.7) |
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 #5665D5 | 4.97:1 | AA | Lc -79.5 | Fine for body text |
| Black text on #5665D5 | 4.21:1 | AA large text | Lc 29.9 | Dividers and decoration only |
| #5665D5 text on white | 4.97:1 | AA | Lc 74.1 | Content text, not long reading |
| #5665D5 text on black | 4.21:1 | AA large text | Lc -27.6 | 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
#E5E9F9
oklch(93.6% 0.022 274.7)
-
Step 200
200
#D0D8F6
oklch(88.6% 0.042 273.7)
-
Step 300
300
#B0BEF3
oklch(80.9% 0.077 273.1)
-
Step 400
400
#889AED
oklch(70.6% 0.123 273.6)
-
Step 500
500
#6D7FE7
oklch(63.2% 0.157 273.7)
-
Step 600
600 (this color)
#5665D5
oklch(55.5% 0.171 273.7)
-
Step 700
700
#4753B9
oklch(49% 0.16 273.9)
-
Step 800
800
#3A4596
oklch(42.7% 0.132 273.6)
-
Step 900
900
#313B77
oklch(37.7% 0.102 273.4)
-
Step 950
950
#1D2346
oklch(27.1% 0.065 273.9)
#5665D5 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) | #2175D9 | 0.055 |
| Deuteranopia (no green cones) | #006AD3 | 0.059 |
| Tritanopia (no blue cones) | #007F93 | 0.149 |
| Achromatopsia (no color) | #707070 | 0.171 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5665D5
#5665D5
oklch(55.5% 0.171 273.7)
- #897100
#897100
oklch(55.5% 0.114 94.1)
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 #5665D5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Periwinkle #665FD1 ΔE 0.025
- Royal Blue #4169E1 ΔE 0.029
- Slate Blue #6A5ACD ΔE 0.037
- Light Indigo #6D5ACF ΔE 0.039
- Warm Blue #4B57DB ΔE 0.040
- Iris #6258C4 ΔE 0.040
- Neon Blue #4361EE ΔE 0.046
- Cerulean Blue #056EEE ΔE 0.065
Use #5665D5 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.