#6674CF
Closest named color: Dark Periwinkle (#665FD1). oklch(59.1% 0.139 274.7), rgb(102, 116, 207).
Aa
Black text reads best on this color (4.96:1).
About this color
#6674CF is a medium-dark, moderately saturated blue. In OKLCH its lightness is 59%, its chroma 0.139 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Periwinkle (#665FD1), ΔE 0.053 away. Black text reads best on it, at 4.96:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.139) |
| Temperature | cool |
| Nearest name | Dark Periwinkle (#665FD1) |
| Black text | 4.96:1 |
| White text | 4.23:1 |
Values
| HEX | #6674CF |
| RGB | rgb(102, 116, 207) |
| HSL | hsl(232, 52%, 61%) |
| OKLCH | oklch(59.1% 0.139 274.7) |
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 #6674CF | 4.23:1 | AA large text | Lc -74.5 | Content text, not long reading |
| Black text on #6674CF | 4.96:1 | AA | Lc 35.0 | Non-text elements, placeholder text |
| #6674CF text on white | 4.23:1 | AA large text | Lc 69.0 | Content text, not long reading |
| #6674CF text on black | 4.96:1 | AA | Lc -32.6 | 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
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E6E9F6
oklch(93.6% 0.018 275.6)
-
Step 200
200
#D2D8F1
oklch(88.5% 0.035 274.9)
-
Step 300
300
#B4BEEA
oklch(80.9% 0.063 274.9)
-
Step 400
400
#8E9CDF
oklch(70.8% 0.099 274.5)
-
Step 500
500
#7382D6
oklch(63.2% 0.127 274.5)
-
Step 600
600 (this color)
#6674CF
oklch(59.1% 0.139 274.7)
-
Step 700
700
#4C57A9
oklch(49% 0.13 274.8)
-
Step 800
800
#3F4889
oklch(42.8% 0.107 275)
-
Step 900
900
#353D6D
oklch(37.7% 0.082 274.6)
-
Step 950
950
#1F2440
oklch(27% 0.052 274.7)
#6674CF 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) | #4E80D2 | 0.038 |
| Deuteranopia (no green cones) | #4377CD | 0.040 |
| Tritanopia (no blue cones) | #3A8897 | 0.124 |
| Achromatopsia (no color) | #7B7B7B | 0.139 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6674CF
#6674CF
oklch(59.1% 0.139 274.7)
- #947B00
#947B00
oklch(58.9% 0.121 94.7)
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 #6674CF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Periwinkle #665FD1 ΔE 0.053
- Windows Blue #3778BF ΔE 0.058
- Soft Blue #6488EA ΔE 0.060
- Cornflower #6A79F7 ΔE 0.061
- Royal Blue #4169E1 ΔE 0.063
- Light Indigo #6D5ACF ΔE 0.064
- Slate Blue #6A5ACD ΔE 0.064
- Medium Slate Blue #7B68EE ΔE 0.064
Use #6674CF 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.