#6578AA
Closest named color: Off Blue (#5684AE). oklch(57.8% 0.081 267.9), rgb(101, 120, 170).
Aa
Black text reads best on this color (4.82:1).
About this color
#6578AA is a medium-dark, moderately saturated blue. In OKLCH its lightness is 58%, its chroma 0.081 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Off Blue (#5684AE), ΔE 0.035 away. Black text reads best on it, at 4.82:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.081) |
| Temperature | cool |
| Nearest name | Off Blue (#5684AE) |
| Black text | 4.82:1 |
| White text | 4.35:1 |
Values
| HEX | #6578AA |
| RGB | rgb(101, 120, 170) |
| HSL | hsl(223, 29%, 53%) |
| OKLCH | oklch(57.8% 0.081 267.9) |
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 #6578AA | 4.35:1 | AA large text | Lc -75.6 | Fine for body text |
| Black text on #6578AA | 4.82:1 | AA | Lc 33.9 | Non-text elements, placeholder text |
| #6578AA text on white | 4.35:1 | AA large text | Lc 70.1 | Content text, not long reading |
| #6578AA text on black | 4.82:1 | AA | Lc -31.5 | 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
#E7EAF1
oklch(93.7% 0.01 267.4)
-
Step 200
200
#D3D9E7
oklch(88.5% 0.02 267.3)
-
Step 300
300
#B6C0D9
oklch(80.8% 0.037 268.2)
-
Step 400
400
#91A0C6
oklch(70.7% 0.058 268)
-
Step 500
500
#7688B7
oklch(63.1% 0.074 268.1)
-
Step 600
600 (this color)
#6578AA
oklch(57.8% 0.081 267.9)
-
Step 700
700
#4E5F8C
oklch(49.1% 0.076 267.8)
-
Step 800
800
#404E71
oklch(42.7% 0.061 267.1)
-
Step 900
900
#36415C
oklch(37.8% 0.049 267)
-
Step 950
950
#202636
oklch(27% 0.031 268.4)
#6578AA 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) | #677CAC | 0.012 |
| Deuteranopia (no green cones) | #6076A9 | 0.009 |
| Tritanopia (no blue cones) | #4E828A | 0.072 |
| Achromatopsia (no color) | #797979 | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6578AA
#6578AA
oklch(57.8% 0.081 267.9)
- #8E773E
#8E773E
oklch(57.8% 0.081 87.8)
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 #6578AA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Off Blue #5684AE ΔE 0.035
- Stormy Blue #507B9C ΔE 0.037
- Dusty Blue #5A86AD ΔE 0.039
- Steel Blue #4682B4 ΔE 0.040
- Cool Blue #4984B8 ΔE 0.043
- Dull Blue #49759C ΔE 0.043
- Cerulean #457B9D ΔE 0.045
- Grey Blue #647D8E ΔE 0.051
Use #6578AA 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.