#675FF4
Closest named color: Medium Slate Blue (#7B68EE). oklch(57.9% 0.216 279.7), rgb(103, 95, 244).
Aa
White text reads best on this color (4.64:1).
About this color
#675FF4 is a medium-dark, vivid blue. In OKLCH its lightness is 58%, its chroma 0.216 and its hue 280°. Its hue sits on the cool side of the wheel. The nearest named color is Medium Slate Blue (#7B68EE), ΔE 0.040 away. White text reads best on it, at 4.64:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.216) |
| Temperature | cool |
| Nearest name | Medium Slate Blue (#7B68EE) |
| Black text | 4.51:1 |
| White text | 4.64:1 |
Values
| HEX | #675FF4 |
| RGB | rgb(103, 95, 244) |
| HSL | hsl(243, 87%, 66%) |
| OKLCH | oklch(57.9% 0.216 279.7) |
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 #675FF4 | 4.64:1 | AA | Lc -77.2 | Fine for body text |
| Black text on #675FF4 | 4.51:1 | AA | Lc 32.3 | Non-text elements, placeholder text |
| #675FF4 text on white | 4.64:1 | AA | Lc 71.8 | Content text, not long reading |
| #675FF4 text on black | 4.51:1 | 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
#F3F5FE
oklch(97.1% 0.012 276.1)
-
Step 100
100
#E6E8FD
oklch(93.6% 0.028 281.5)
-
Step 200
200
#D1D6FD
oklch(88.5% 0.054 279.5)
-
Step 300
300
#B3BAFF
oklch(80.8% 0.098 279.5)
-
Step 400
400
#8E93FF
oklch(70.6% 0.156 279.6)
-
Step 500
500
#7674FD
oklch(63.2% 0.198 279.7)
-
Step 600
600 (this color)
#675FF4
oklch(57.9% 0.216 279.7)
-
Step 700
700
#5146CD
oklch(49.1% 0.2 279.7)
-
Step 800
800
#423BA6
oklch(42.7% 0.166 279.7)
-
Step 900
900
#373484
oklch(37.7% 0.13 279.8)
-
Step 950
950
#201F4D
oklch(26.9% 0.083 280.3)
#675FF4 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) | #007AF9 | 0.087 |
| Deuteranopia (no green cones) | #006FF1 | 0.080 |
| Tritanopia (no blue cones) | #0084A1 | 0.186 |
| Achromatopsia (no color) | #747474 | 0.217 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #675FF4
#675FF4
oklch(57.9% 0.216 279.7)
- #8B7A00
#8B7A00
oklch(57.7% 0.12 99.5)
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 #675FF4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Medium Slate Blue #7B68EE ΔE 0.040
- Neon Blue #4361EE ΔE 0.046
- Dark Periwinkle #665FD1 ΔE 0.053
- Royal Blue #4169E1 ΔE 0.057
- Light Indigo #6D5ACF ΔE 0.057
- Purpley #8756E4 ΔE 0.058
- Warm Blue #4B57DB ΔE 0.059
- Slate Blue #6A5ACD ΔE 0.060
Use #675FF4 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.