#6573AE
Closest named color: Dull Blue (#49759C). oklch(56.9% 0.093 273), rgb(101, 115, 174).
Aa
Black text reads best on this color (4.61:1).
About this color
#6573AE is a medium-dark, moderately saturated blue. In OKLCH its lightness is 57%, its chroma 0.093 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Dull Blue (#49759C), ΔE 0.047 away. Black text reads best on it, at 4.61:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.093) |
| Temperature | cool |
| Nearest name | Dull Blue (#49759C) |
| Black text | 4.61:1 |
| White text | 4.54:1 |
Values
| HEX | #6573AE |
| RGB | rgb(101, 115, 174) |
| HSL | hsl(228, 31%, 54%) |
| OKLCH | oklch(56.9% 0.093 273) |
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 #6573AE | 4.54:1 | AA | Lc -77.0 | Fine for body text |
| Black text on #6573AE | 4.61:1 | AA | Lc 32.6 | Non-text elements, placeholder text |
| #6573AE text on white | 4.54:1 | AA | Lc 71.5 | Content text, not long reading |
| #6573AE text on black | 4.61:1 | AA | Lc -30.1 | 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
#E7E9F2
oklch(93.5% 0.012 276.1)
-
Step 200
200
#D4D8E9
oklch(88.4% 0.024 275.3)
-
Step 300
300
#B7BFDC
oklch(80.8% 0.042 273.2)
-
Step 400
400
#929ECB
oklch(70.6% 0.067 273)
-
Step 500
500
#7886BE
oklch(63.1% 0.086 272.9)
-
Step 600
600 (this color)
#6573AE
oklch(56.9% 0.093 273)
-
Step 700
700
#515D92
oklch(49.2% 0.086 273.2)
-
Step 800
800
#424C76
oklch(42.7% 0.071 272.9)
-
Step 900
900
#383F5F
oklch(37.6% 0.056 274)
-
Step 950
950
#212538
oklch(27% 0.036 274.6)
#6573AE 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) | #5F79B0 | 0.017 |
| Deuteranopia (no green cones) | #5973AD | 0.016 |
| Tritanopia (no blue cones) | #4D7F88 | 0.084 |
| Achromatopsia (no color) | #767676 | 0.093 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6573AE
#6573AE
oklch(56.9% 0.093 273)
- #8A762F
#8A762F
oklch(57% 0.093 93.4)
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 #6573AE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Blue #49759C ΔE 0.047
- Stormy Blue #507B9C ΔE 0.048
- Flat Blue #3C73A8 ΔE 0.049
- Steel Blue #4682B4 ΔE 0.049
- Off Blue #5684AE ΔE 0.049
- French Blue #436BAD ΔE 0.050
- Cool Blue #4984B8 ΔE 0.052
- Windows Blue #3778BF ΔE 0.053
Use #6573AE 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.