#6369D9
Closest named color: Dark Periwinkle (#665FD1). oklch(57.4% 0.168 277.4), rgb(99, 105, 217).
Aa
White text reads best on this color (4.61:1).
About this color
#6369D9 is a medium-dark, vivid blue. In OKLCH its lightness is 57%, its chroma 0.168 and its hue 277°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Periwinkle (#665FD1), ΔE 0.026 away. White text reads best on it, at 4.61:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.168) |
| Temperature | cool |
| Nearest name | Dark Periwinkle (#665FD1) |
| Black text | 4.55:1 |
| White text | 4.61:1 |
Values
| HEX | #6369D9 |
| RGB | rgb(99, 105, 217) |
| HSL | hsl(237, 61%, 62%) |
| OKLCH | oklch(57.4% 0.168 277.4) |
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 #6369D9 | 4.61:1 | AA | Lc -77.2 | Fine for body text |
| Black text on #6369D9 | 4.55:1 | AA | Lc 32.3 | Non-text elements, placeholder text |
| #6369D9 text on white | 4.61:1 | AA | Lc 71.8 | Content text, not long reading |
| #6369D9 text on black | 4.55:1 | AA | Lc -29.9 | 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
#E6E9F9
oklch(93.6% 0.022 277.5)
-
Step 200
200
#D2D7F5
oklch(88.5% 0.042 278)
-
Step 300
300
#B4BDF2
oklch(81% 0.076 277.1)
-
Step 400
400
#8E99EB
oklch(70.8% 0.12 277)
-
Step 500
500
#747DE5
oklch(63.1% 0.155 277.3)
-
Step 600
600 (this color)
#6369D9
oklch(57.4% 0.168 277.4)
-
Step 700
700
#4E52B7
oklch(49.1% 0.157 277.3)
-
Step 800
800
#404494
oklch(42.8% 0.129 277.3)
-
Step 900
900
#363A76
oklch(37.8% 0.101 277.5)
-
Step 950
950
#1F2245
oklch(26.9% 0.064 277.4)
#6369D9 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) | #2C7ADD | 0.063 |
| Deuteranopia (no green cones) | #1870D7 | 0.067 |
| Tritanopia (no blue cones) | #298297 | 0.147 |
| Achromatopsia (no color) | #757575 | 0.169 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6369D9
#6369D9
oklch(57.4% 0.168 277.4)
- #8C7800
#8C7800
oklch(57.4% 0.118 97.5)
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 #6369D9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Periwinkle #665FD1 ΔE 0.026
- Light Indigo #6D5ACF ΔE 0.038
- Slate Blue #6A5ACD ΔE 0.039
- Royal Blue #4169E1 ΔE 0.042
- Medium Slate Blue #7B68EE ΔE 0.048
- Iris #6258C4 ΔE 0.050
- Neon Blue #4361EE ΔE 0.056
- Warm Blue #4B57DB ΔE 0.058
Use #6369D9 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.