#6571DF
Closest named color: Cornflower (#6A79F7). oklch(59.4% 0.166 275.5), rgb(101, 113, 223).
Aa
Black text reads best on this color (4.98:1).
About this color
#6571DF is a medium-dark, vivid blue. In OKLCH its lightness is 59%, its chroma 0.166 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower (#6A79F7), ΔE 0.040 away. Black text reads best on it, at 4.98:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.166) |
| Temperature | cool |
| Nearest name | Cornflower (#6A79F7) |
| Black text | 4.98:1 |
| White text | 4.21:1 |
Values
| HEX | #6571DF |
| RGB | rgb(101, 113, 223) |
| HSL | hsl(234, 66%, 64%) |
| OKLCH | oklch(59.4% 0.166 275.5) |
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 #6571DF | 4.21:1 | AA large text | Lc -74.3 | Content text, not long reading |
| Black text on #6571DF | 4.98:1 | AA | Lc 35.2 | Non-text elements, placeholder text |
| #6571DF text on white | 4.21:1 | AA large text | Lc 68.8 | Content text, not long reading |
| #6571DF text on black | 4.98:1 | AA | Lc -32.8 | 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 500.
-
Step 50
50
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E5E9FA
oklch(93.6% 0.023 275.4)
-
Step 200
200
#D0D7F8
oklch(88.4% 0.046 276)
-
Step 300
300
#B1BDF5
oklch(80.9% 0.08 275.1)
-
Step 400
400
#8A99F1
oklch(70.8% 0.13 275.2)
-
Step 500
500 (this color)
#6571DF
oklch(59.4% 0.166 275.5)
-
Step 600
600
#5963DA
oklch(55.6% 0.18 275.3)
-
Step 700
700
#4A51BD
oklch(49.1% 0.167 275.6)
-
Step 800
800
#3C4399
oklch(42.7% 0.139 275.3)
-
Step 900
900
#333A7A
oklch(37.8% 0.108 275.3)
-
Step 950
950
#1E2247
oklch(27% 0.068 276.2)
#6571DF 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) | #3A81E3 | 0.054 |
| Deuteranopia (no green cones) | #2976DD | 0.057 |
| Tritanopia (no blue cones) | #258A9D | 0.147 |
| Achromatopsia (no color) | #7B7B7B | 0.166 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6571DF
#6571DF
oklch(59.4% 0.166 275.5)
- #957D00
#957D00
oklch(59.5% 0.122 95.5)
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 #6571DF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower #6A79F7 ΔE 0.040
- Medium Slate Blue #7B68EE ΔE 0.043
- Dark Periwinkle #665FD1 ΔE 0.047
- Royal Blue #4169E1 ΔE 0.050
- Light Indigo #6D5ACF ΔE 0.058
- Soft Blue #6488EA ΔE 0.059
- Slate Blue #6A5ACD ΔE 0.059
- Neon Blue #4361EE ΔE 0.065
Use #6571DF 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.