#6A78BB
Closest named color: Cool Blue (#4984B8). oklch(59% 0.104 273.8), rgb(106, 120, 187).
Aa
Black text reads best on this color (5.01:1).
About this color
#6A78BB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 59%, its chroma 0.104 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Blue (#4984B8), ΔE 0.048 away. Black text reads best on it, at 5.01:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.104) |
| Temperature | cool |
| Nearest name | Cool Blue (#4984B8) |
| Black text | 5.01:1 |
| White text | 4.18:1 |
Values
| HEX | #6A78BB |
| RGB | rgb(106, 120, 187) |
| HSL | hsl(230, 37%, 57%) |
| OKLCH | oklch(59% 0.104 273.8) |
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 #6A78BB | 4.18:1 | AA large text | Lc -74.3 | Content text, not long reading |
| Black text on #6A78BB | 5.01:1 | AA | Lc 35.3 | Non-text elements, placeholder text |
| #6A78BB text on white | 4.18:1 | AA large text | Lc 68.8 | Content text, not long reading |
| #6A78BB text on black | 5.01:1 | AA | Lc -32.9 | 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
#F4F5FA
oklch(97.1% 0.007 277.2)
-
Step 100
100
#E7E9F3
oklch(93.5% 0.014 277.1)
-
Step 200
200
#D3D8EB
oklch(88.4% 0.027 274.1)
-
Step 300
300
#B7BFE0
oklch(80.9% 0.047 274.6)
-
Step 400
400
#929ED0
oklch(70.8% 0.075 273.9)
-
Step 500
500
#7785C3
oklch(63.1% 0.095 273.7)
-
Step 600
600 (this color)
#6A78BB
oklch(59% 0.104 273.8)
-
Step 700
700
#505C97
oklch(49.2% 0.096 273.7)
-
Step 800
800
#414B7B
oklch(42.7% 0.081 273.6)
-
Step 900
900
#373F63
oklch(37.7% 0.063 273.5)
-
Step 950
950
#20253A
oklch(27% 0.04 273.2)
#6A78BB 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) | #607FBE | 0.021 |
| Deuteranopia (no green cones) | #5A79B9 | 0.021 |
| Tritanopia (no blue cones) | #4F8691 | 0.093 |
| Achromatopsia (no color) | #7C7C7C | 0.104 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6A78BB
#6A78BB
oklch(59% 0.104 273.8)
- #927C28
#927C28
oklch(59.1% 0.104 94)
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 #6A78BB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Blue #4984B8 ΔE 0.048
- Off Blue #5684AE ΔE 0.049
- Steel Blue #4682B4 ΔE 0.050
- Dusty Blue #5A86AD ΔE 0.052
- Windows Blue #3778BF ΔE 0.055
- Faded Blue #658CBB ΔE 0.056
- Stormy Blue #507B9C ΔE 0.062
- Flat Blue #3C73A8 ΔE 0.065
Use #6A78BB 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.