#6B78AE
Closest named color: Off Blue (#5684AE). oklch(58.4% 0.085 273.2), rgb(107, 120, 174).
Aa
Black text reads best on this color (4.92:1).
About this color
#6B78AE is a medium-dark, moderately saturated blue. In OKLCH its lightness is 58%, its chroma 0.085 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Off Blue (#5684AE), ΔE 0.040 away. Black text reads best on it, at 4.92:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.085) |
| Temperature | cool |
| Nearest name | Off Blue (#5684AE) |
| Black text | 4.92:1 |
| White text | 4.26:1 |
Values
| HEX | #6B78AE |
| RGB | rgb(107, 120, 174) |
| HSL | hsl(228, 29%, 55%) |
| OKLCH | oklch(58.4% 0.085 273.2) |
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 #6B78AE | 4.26:1 | AA large text | Lc -74.9 | Content text, not long reading |
| Black text on #6B78AE | 4.92:1 | AA | Lc 34.6 | Non-text elements, placeholder text |
| #6B78AE text on white | 4.26:1 | AA large text | Lc 69.4 | Content text, not long reading |
| #6B78AE text on black | 4.92:1 | AA | Lc -32.2 | 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 600.
-
Step 50
50
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E7E9F1
oklch(93.5% 0.011 274.9)
-
Step 200
200
#D4D9E8
oklch(88.6% 0.021 271.2)
-
Step 300
300
#B8C0DA
oklch(81% 0.038 272)
-
Step 400
400
#949FC7
oklch(70.8% 0.06 272.8)
-
Step 500
500
#7A86B9
oklch(63% 0.078 273.8)
-
Step 600
600 (this color)
#6B78AE
oklch(58.4% 0.085 273.2)
-
Step 700
700
#525D8D
oklch(49% 0.078 273.3)
-
Step 800
800
#434C73
oklch(42.6% 0.066 273.4)
-
Step 900
900
#39405D
oklch(37.8% 0.051 273.3)
-
Step 950
950
#212536
oklch(26.9% 0.032 273.8)
#6B78AE 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) | #667DB0 | 0.014 |
| Deuteranopia (no green cones) | #6178AD | 0.013 |
| Tritanopia (no blue cones) | #57838B | 0.076 |
| Achromatopsia (no color) | #7A7A7A | 0.085 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6B78AE
#6B78AE
oklch(58.4% 0.085 273.2)
- #8D7A3D
#8D7A3D
oklch(58.4% 0.084 92.4)
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 #6B78AE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Off Blue #5684AE ΔE 0.040
- Dusty Blue #5A86AD ΔE 0.043
- Steel Blue #4682B4 ΔE 0.046
- Cool Blue #4984B8 ΔE 0.046
- Stormy Blue #507B9C ΔE 0.047
- Lavender Gray #7E7F9A ΔE 0.050
- Dull Blue #49759C ΔE 0.053
- Faded Blue #658CBB ΔE 0.054
Use #6B78AE 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.