#6365DF
Closest named color: Dark Periwinkle (#665FD1). oklch(57% 0.182 278.2), rgb(99, 101, 223).
Aa
White text reads best on this color (4.71:1).
About this color
#6365DF is a medium-dark, vivid blue. In OKLCH its lightness is 57%, its chroma 0.182 and its hue 278°. 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 4.71:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.182) |
| Temperature | cool |
| Nearest name | Dark Periwinkle (#665FD1) |
| Black text | 4.45:1 |
| White text | 4.71:1 |
Values
| HEX | #6365DF |
| RGB | rgb(99, 101, 223) |
| HSL | hsl(239, 66%, 63%) |
| OKLCH | oklch(57% 0.182 278.2) |
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 #6365DF | 4.71:1 | AA | Lc -77.8 | Fine for body text |
| Black text on #6365DF | 4.45:1 | AA large text | Lc 31.7 | Non-text elements, placeholder text |
| #6365DF text on white | 4.71:1 | AA | Lc 72.4 | Content text, not long reading |
| #6365DF text on black | 4.45:1 | AA large text | Lc -29.3 | 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
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E6E9FA
oklch(93.7% 0.023 277.9)
-
Step 200
200
#D2D7F8
oklch(88.6% 0.046 278.6)
-
Step 300
300
#B4BCF5
oklch(80.9% 0.081 278.2)
-
Step 400
400
#8E97F1
oklch(70.7% 0.131 278.1)
-
Step 500
500
#757AEC
oklch(63% 0.168 278.5)
-
Step 600
600 (this color)
#6365DF
oklch(57% 0.182 278.2)
-
Step 700
700
#4F4FBD
oklch(49.1% 0.169 278.2)
-
Step 800
800
#404199
oklch(42.6% 0.14 278.1)
-
Step 900
900
#36387A
oklch(37.7% 0.11 278.4)
-
Step 950
950
#1F2247
oklch(27.1% 0.068 277.3)
#6365DF 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) | #0F79E3 | 0.075 |
| Deuteranopia (no green cones) | #006FDC | 0.074 |
| Tritanopia (no blue cones) | #208198 | 0.158 |
| Achromatopsia (no color) | #737373 | 0.182 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6365DF
#6365DF
oklch(57% 0.182 278.2)
- #8A7700
#8A7700
oklch(57% 0.118 98)
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 #6365DF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Periwinkle #665FD1 ΔE 0.025
- Light Indigo #6D5ACF ΔE 0.036
- Slate Blue #6A5ACD ΔE 0.037
- Royal Blue #4169E1 ΔE 0.040
- Medium Slate Blue #7B68EE ΔE 0.043
- Neon Blue #4361EE ΔE 0.048
- Warm Blue #4B57DB ΔE 0.050
- Iris #6258C4 ΔE 0.050
Use #6365DF 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.