#6378DF
Closest named color: Cornflower (#6A79F7). oklch(60.6% 0.157 272.3), rgb(99, 120, 223).
Aa
Black text reads best on this color (5.28:1).
About this color
#6378DF is a medium-dark, vivid blue. In OKLCH its lightness is 61%, its chroma 0.157 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower (#6A79F7), ΔE 0.037 away. Black text reads best on it, at 5.28:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | vivid (0.157) |
| Temperature | cool |
| Nearest name | Cornflower (#6A79F7) |
| Black text | 5.28:1 |
| White text | 3.97:1 |
Values
| HEX | #6378DF |
| RGB | rgb(99, 120, 223) |
| HSL | hsl(230, 66%, 63%) |
| OKLCH | oklch(60.6% 0.157 272.3) |
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 #6378DF | 3.97:1 | AA large text | Lc -72.4 | Content text, not long reading |
| Black text on #6378DF | 5.28:1 | AA | Lc 37.2 | Non-text elements, placeholder text |
| #6378DF text on white | 3.97:1 | AA large text | Lc 66.9 | Content text, not long reading |
| #6378DF text on black | 5.28:1 | AA | Lc -34.8 | 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
#E4E9F9
oklch(93.5% 0.022 272.1)
-
Step 200
200
#CFD8F6
oklch(88.5% 0.042 272.3)
-
Step 300
300
#AFBEF3
oklch(80.9% 0.077 272.3)
-
Step 400
400
#869BED
oklch(70.7% 0.123 272)
-
Step 500
500 (this color)
#6378DF
oklch(60.6% 0.157 272.3)
-
Step 600
600
#5366D6
oklch(55.5% 0.172 272.3)
-
Step 700
700
#4454B9
oklch(49% 0.159 272.4)
-
Step 800
800
#384696
oklch(42.8% 0.131 272.2)
-
Step 900
900
#303B77
oklch(37.6% 0.103 272.7)
-
Step 950
950
#1C2346
oklch(27% 0.065 272.8)
#6378DF 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) | #4885E3 | 0.040 |
| Deuteranopia (no green cones) | #387ADD | 0.043 |
| Tritanopia (no blue cones) | #1A8FA1 | 0.140 |
| Achromatopsia (no color) | #808080 | 0.157 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6378DF
#6378DF
oklch(60.6% 0.157 272.3)
- #9D7F00
#9D7F00
oklch(60.7% 0.124 92.1)
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 #6378DF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower #6A79F7 ΔE 0.037
- Soft Blue #6488EA ΔE 0.042
- Medium Slate Blue #7B68EE ΔE 0.055
- Royal Blue #4169E1 ΔE 0.059
- Dark Sky Blue #448EE4 ΔE 0.060
- Dark Periwinkle #665FD1 ΔE 0.063
- Clear Blue #247AFD ΔE 0.068
- Windows Blue #3778BF ΔE 0.070
Use #6378DF 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.