#6573AD
Closest named color: Dull Blue (#49759C). oklch(56.9% 0.091 272.8), rgb(101, 115, 173).
Aa
Black text reads best on this color (4.60:1).
About this color
#6573AD is a medium-dark, moderately saturated blue. In OKLCH its lightness is 57%, its chroma 0.091 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Dull Blue (#49759C), ΔE 0.046 away. Black text reads best on it, at 4.60:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.091) |
| Temperature | cool |
| Nearest name | Dull Blue (#49759C) |
| Black text | 4.60:1 |
| White text | 4.55:1 |
Values
| HEX | #6573AD |
| RGB | rgb(101, 115, 173) |
| HSL | hsl(228, 31%, 54%) |
| OKLCH | oklch(56.9% 0.091 272.8) |
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 #6573AD | 4.55:1 | AA | Lc -77.0 | Fine for body text |
| Black text on #6573AD | 4.60:1 | AA | Lc 32.5 | Non-text elements, placeholder text |
| #6573AD text on white | 4.55:1 | AA | Lc 71.6 | Content text, not long reading |
| #6573AD text on black | 4.60:1 | 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
#D4D9E9
oklch(88.6% 0.023 272)
-
Step 300
300
#B7BFDC
oklch(80.8% 0.042 273.2)
-
Step 400
400
#939ECA
oklch(70.6% 0.066 273.7)
-
Step 500
500
#7886BD
oklch(63.1% 0.085 272.8)
-
Step 600
600 (this color)
#6573AD
oklch(56.9% 0.091 272.8)
-
Step 700
700
#515D91
oklch(49.2% 0.085 273)
-
Step 800
800
#424C76
oklch(42.7% 0.071 272.9)
-
Step 900
900
#38405F
oklch(37.8% 0.054 272.5)
-
Step 950
950
#212538
oklch(27% 0.036 274.6)
#6573AD 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) | #5F79AF | 0.017 |
| Deuteranopia (no green cones) | #5973AC | 0.016 |
| Tritanopia (no blue cones) | #4E7F88 | 0.082 |
| Achromatopsia (no color) | #767676 | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6573AD
#6573AD
oklch(56.9% 0.091 272.8)
- #8A7531
#8A7531
oklch(56.8% 0.091 92.1)
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 #6573AD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Blue #49759C ΔE 0.046
- Stormy Blue #507B9C ΔE 0.047
- Flat Blue #3C73A8 ΔE 0.048
- Off Blue #5684AE ΔE 0.049
- Steel Blue #4682B4 ΔE 0.049
- French Blue #436BAD ΔE 0.050
- Cool Blue #4984B8 ΔE 0.052
- Cerulean #457B9D ΔE 0.053
Use #6573AD 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.