#6370E0
Closest named color: Cornflower (#6A79F7). oklch(59.2% 0.169 275), rgb(99, 112, 224).
Aa
Black text reads best on this color (4.92:1).
About this color
#6370E0 is a medium-dark, vivid blue. In OKLCH its lightness is 59%, its chroma 0.169 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower (#6A79F7), ΔE 0.041 away. Black text reads best on it, at 4.92:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.169) |
| Temperature | cool |
| Nearest name | Cornflower (#6A79F7) |
| Black text | 4.92:1 |
| White text | 4.26:1 |
Values
| HEX | #6370E0 |
| RGB | rgb(99, 112, 224) |
| HSL | hsl(234, 67%, 63%) |
| OKLCH | oklch(59.2% 0.169 275) |
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 #6370E0 | 4.26:1 | AA large text | Lc -74.7 | Content text, not long reading |
| Black text on #6370E0 | 4.92:1 | AA | Lc 34.9 | Non-text elements, placeholder text |
| #6370E0 text on white | 4.26:1 | AA large text | Lc 69.2 | Content text, not long reading |
| #6370E0 text on black | 4.92:1 | AA | Lc -32.5 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
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
#B2BDF2
oklch(80.8% 0.076 275.5)
-
Step 400
400
#8B9AEC
oklch(70.8% 0.121 275)
-
Step 500
500
#707EE6
oklch(63.1% 0.156 275.2)
-
Step 600
600 (this color)
#6370E0
oklch(59.2% 0.169 275)
-
Step 700
700
#4A53B8
oklch(49.1% 0.158 275.2)
-
Step 800
800
#3C4595
oklch(42.8% 0.13 274.7)
-
Step 900
900
#333B76
oklch(37.8% 0.1 274.8)
-
Step 950
950
#1E2345
oklch(27.1% 0.063 275.1)
#6370E0 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) | #3680E4 | 0.054 |
| Deuteranopia (no green cones) | #2175DE | 0.059 |
| Tritanopia (no blue cones) | #1B899D | 0.149 |
| Achromatopsia (no color) | #7A7A7A | 0.169 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6370E0
#6370E0
oklch(59.2% 0.169 275)
- #947C00
#947C00
oklch(59.1% 0.121 95.4)
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 #6370E0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower #6A79F7 ΔE 0.041
- Medium Slate Blue #7B68EE ΔE 0.043
- Dark Periwinkle #665FD1 ΔE 0.045
- Royal Blue #4169E1 ΔE 0.046
- Light Indigo #6D5ACF ΔE 0.056
- Slate Blue #6A5ACD ΔE 0.057
- Neon Blue #4361EE ΔE 0.061
- Soft Blue #6488EA ΔE 0.061
Use #6370E0 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.