#6364EE
Closest named color: Medium Slate Blue (#7B68EE). oklch(58% 0.203 277.7), rgb(99, 100, 238).
Aa
Black text reads best on this color (4.58:1).
About this color
#6364EE is a medium-dark, vivid blue. In OKLCH its lightness is 58%, its chroma 0.203 and its hue 278°. Its hue sits on the cool side of the wheel. The nearest named color is Medium Slate Blue (#7B68EE), ΔE 0.038 away. Black text reads best on it, at 4.58:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.203) |
| Temperature | cool |
| Nearest name | Medium Slate Blue (#7B68EE) |
| Black text | 4.58:1 |
| White text | 4.57:1 |
Values
| HEX | #6364EE |
| RGB | rgb(99, 100, 238) |
| HSL | hsl(240, 80%, 66%) |
| OKLCH | oklch(58% 0.203 277.7) |
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 #6364EE | 4.57:1 | AA | Lc -76.8 | Fine for body text |
| Black text on #6364EE | 4.58:1 | AA | Lc 32.7 | Non-text elements, placeholder text |
| #6364EE text on white | 4.57:1 | AA | Lc 71.4 | Content text, not long reading |
| #6364EE text on black | 4.58:1 | AA | Lc -30.3 | Non-text elements, placeholder text |
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
#F3F5FE
oklch(97.1% 0.012 276.1)
-
Step 100
100
#E5E9FC
oklch(93.7% 0.026 276.4)
-
Step 200
200
#D0D7FB
oklch(88.5% 0.05 276.6)
-
Step 300
300
#B2BBFB
oklch(80.8% 0.091 278)
-
Step 400
400
#8C96FA
oklch(70.8% 0.146 277.7)
-
Step 500
500
#7278F7
oklch(63.2% 0.186 277.6)
-
Step 600
600 (this color)
#6364EE
oklch(58% 0.203 277.7)
-
Step 700
700
#4D4BC8
oklch(49.2% 0.189 277.6)
-
Step 800
800
#3F3EA1
oklch(42.6% 0.156 277.9)
-
Step 900
900
#353680
oklch(37.6% 0.122 278.2)
-
Step 950
950
#1E214B
oklch(27.1% 0.077 276.9)
#6364EE 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) | #007BF3 | 0.079 |
| Deuteranopia (no green cones) | #0070EB | 0.073 |
| Tritanopia (no blue cones) | #00859F | 0.175 |
| Achromatopsia (no color) | #757575 | 0.203 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6364EE
#6364EE
oklch(58% 0.203 277.7)
- #8E7A00
#8E7A00
oklch(58.1% 0.12 97.7)
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 #6364EE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Medium Slate Blue #7B68EE ΔE 0.038
- Neon Blue #4361EE ΔE 0.041
- Dark Periwinkle #665FD1 ΔE 0.045
- Royal Blue #4169E1 ΔE 0.046
- Light Indigo #6D5ACF ΔE 0.052
- Cornflower #6A79F7 ΔE 0.052
- Slate Blue #6A5ACD ΔE 0.054
- Warm Blue #4B57DB ΔE 0.055
Use #6364EE 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.