#6578AC
Closest named color: Off Blue (#5684AE). oklch(57.9% 0.084 268.4), rgb(101, 120, 172).
Aa
Black text reads best on this color (4.83:1).
About this color
#6578AC is a medium-dark, moderately saturated blue. In OKLCH its lightness is 58%, its chroma 0.084 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Off Blue (#5684AE), ΔE 0.036 away. Black text reads best on it, at 4.83:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.084) |
| Temperature | cool |
| Nearest name | Off Blue (#5684AE) |
| Black text | 4.83:1 |
| White text | 4.34:1 |
Values
| HEX | #6578AC |
| RGB | rgb(101, 120, 172) |
| HSL | hsl(224, 30%, 54%) |
| OKLCH | oklch(57.9% 0.084 268.4) |
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 #6578AC | 4.34:1 | AA large text | Lc -75.5 | Fine for body text |
| Black text on #6578AC | 4.83:1 | AA | Lc 34.1 | Non-text elements, placeholder text |
| #6578AC text on white | 4.34:1 | AA large text | Lc 70.0 | Content text, not long reading |
| #6578AC text on black | 4.83:1 | AA | Lc -31.6 | 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
#B6C0DA
oklch(80.8% 0.038 268.8)
-
Step 400
400
#91A0C7
oklch(70.8% 0.06 268.4)
-
Step 500
500
#7688B9
oklch(63.2% 0.077 268.6)
-
Step 600
600 (this color)
#6578AC
oklch(57.9% 0.084 268.4)
-
Step 700
700
#4E5F8D
oklch(49.2% 0.077 268)
-
Step 800
800
#404D73
oklch(42.6% 0.066 269.1)
-
Step 900
900
#36415D
oklch(37.8% 0.05 267.5)
-
Step 950
950
#202636
oklch(27% 0.031 268.4)
#6578AC 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) | #667DAE | 0.014 |
| Deuteranopia (no green cones) | #5F76AB | 0.010 |
| Tritanopia (no blue cones) | #4E838A | 0.076 |
| Achromatopsia (no color) | #797979 | 0.084 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6578AC
#6578AC
oklch(57.9% 0.084 268.4)
- #8E773C
#8E773C
oklch(57.8% 0.083 88.4)
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 #6578AC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Off Blue #5684AE ΔE 0.036
- Stormy Blue #507B9C ΔE 0.039
- Steel Blue #4682B4 ΔE 0.040
- Dusty Blue #5A86AD ΔE 0.040
- Cool Blue #4984B8 ΔE 0.042
- Dull Blue #49759C ΔE 0.045
- Cerulean #457B9D ΔE 0.047
- Flat Blue #3C73A8 ΔE 0.051
Use #6578AC 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.