#6678DA
Closest named color: Cornflower (#6A79F7). oklch(60.5% 0.149 273.3), rgb(102, 120, 218).
Aa
Black text reads best on this color (5.26:1).
About this color
#6678DA is a medium-dark, vivid blue. In OKLCH its lightness is 61%, its chroma 0.149 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower (#6A79F7), ΔE 0.044 away. Black text reads best on it, at 5.26:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | vivid (0.149) |
| Temperature | cool |
| Nearest name | Cornflower (#6A79F7) |
| Black text | 5.26:1 |
| White text | 3.98:1 |
Values
| HEX | #6678DA |
| RGB | rgb(102, 120, 218) |
| HSL | hsl(231, 61%, 63%) |
| OKLCH | oklch(60.5% 0.149 273.3) |
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 #6678DA | 3.98:1 | AA large text | Lc -72.5 | Content text, not long reading |
| Black text on #6678DA | 5.26:1 | AA | Lc 37.1 | Non-text elements, placeholder text |
| #6678DA text on white | 3.98:1 | AA large text | Lc 67.0 | Content text, not long reading |
| #6678DA text on black | 5.26:1 | AA | Lc -34.6 | 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 500.
-
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
#D0D8F5
oklch(88.5% 0.041 273.3)
-
Step 300
300
#B1BEF1
oklch(80.9% 0.074 273.5)
-
Step 400
400
#899BE9
oklch(70.7% 0.116 273.2)
-
Step 500
500 (this color)
#6678DA
oklch(60.5% 0.149 273.3)
-
Step 600
600
#5767D1
oklch(55.6% 0.163 273.5)
-
Step 700
700
#4755B5
oklch(49.1% 0.152 273.3)
-
Step 800
800
#3A4692
oklch(42.6% 0.125 273.2)
-
Step 900
900
#323C75
oklch(37.8% 0.097 273.4)
-
Step 950
950
#1D2344
oklch(26.9% 0.062 273.8)
#6678DA 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) | #4D84DE | 0.038 |
| Deuteranopia (no green cones) | #407BD8 | 0.041 |
| Tritanopia (no blue cones) | #2E8D9E | 0.133 |
| Achromatopsia (no color) | #7F7F7F | 0.150 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6678DA
#6678DA
oklch(60.5% 0.149 273.3)
- #9B7F00
#9B7F00
oklch(60.5% 0.124 93.3)
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 #6678DA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower #6A79F7 ΔE 0.044
- Soft Blue #6488EA ΔE 0.044
- Medium Slate Blue #7B68EE ΔE 0.057
- Dark Sky Blue #448EE4 ΔE 0.061
- Dark Periwinkle #665FD1 ΔE 0.062
- Royal Blue #4169E1 ΔE 0.063
- Medium Purple #9370DB ΔE 0.066
- Windows Blue #3778BF ΔE 0.067
Use #6678DA 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.