#6378E5
Closest named color: Cornflower (#6A79F7). oklch(61% 0.165 272.4), rgb(99, 120, 229).
Aa
Black text reads best on this color (5.34:1).
About this color
#6378E5 is a medium-dark, vivid blue. In OKLCH its lightness is 61%, its chroma 0.165 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower (#6A79F7), ΔE 0.029 away. Black text reads best on it, at 5.34:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | vivid (0.165) |
| Temperature | cool |
| Nearest name | Cornflower (#6A79F7) |
| Black text | 5.34:1 |
| White text | 3.92:1 |
Values
| HEX | #6378E5 |
| RGB | rgb(99, 120, 229) |
| HSL | hsl(230, 71%, 64%) |
| OKLCH | oklch(61% 0.165 272.4) |
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 #6378E5 | 3.92:1 | AA large text | Lc -71.9 | Content text, not long reading |
| Black text on #6378E5 | 5.34:1 | AA | Lc 37.7 | Non-text elements, placeholder text |
| #6378E5 text on white | 3.92:1 | AA large text | Lc 66.4 | Content text, not long reading |
| #6378E5 text on black | 5.34:1 | AA | Lc -35.2 | 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
#E4E9FA
oklch(93.5% 0.024 272.8)
-
Step 200
200
#CFD8F8
oklch(88.5% 0.045 273)
-
Step 300
300
#AEBEF6
oklch(80.9% 0.081 272.1)
-
Step 400
400
#859AF1
oklch(70.6% 0.13 272.4)
-
Step 500
500 (this color)
#6378E5
oklch(61% 0.165 272.4)
-
Step 600
600
#5265DA
oklch(55.6% 0.179 272.3)
-
Step 700
700
#4353BE
oklch(49.1% 0.168 272.3)
-
Step 800
800
#374599
oklch(42.8% 0.137 272.2)
-
Step 900
900
#2F3B7A
oklch(37.8% 0.107 272.2)
-
Step 950
950
#1B2347
oklch(27% 0.068 271.8)
#6378E5 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) | #4386E9 | 0.044 |
| Deuteranopia (no green cones) | #2F7BE3 | 0.049 |
| Tritanopia (no blue cones) | #0790A3 | 0.147 |
| Achromatopsia (no color) | #808080 | 0.166 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6378E5
#6378E5
oklch(61% 0.165 272.4)
- #9E8000
#9E8000
oklch(61.1% 0.125 92.3)
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 #6378E5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower #6A79F7 ΔE 0.029
- Soft Blue #6488EA ΔE 0.041
- Medium Slate Blue #7B68EE ΔE 0.050
- Royal Blue #4169E1 ΔE 0.058
- Dark Sky Blue #448EE4 ΔE 0.061
- Clear Blue #247AFD ΔE 0.063
- Dark Periwinkle #665FD1 ΔE 0.065
- Medium Purple #9370DB ΔE 0.070
Use #6378E5 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.