#6573AB
Closest named color: Dull Blue (#49759C). oklch(56.8% 0.088 272.6), rgb(101, 115, 171).
Aa
Black text reads best on this color (4.59:1).
About this color
#6573AB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 57%, its chroma 0.088 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Dull Blue (#49759C), ΔE 0.044 away. Black text reads best on it, at 4.59:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.088) |
| Temperature | cool |
| Nearest name | Dull Blue (#49759C) |
| Black text | 4.59:1 |
| White text | 4.57:1 |
Values
| HEX | #6573AB |
| RGB | rgb(101, 115, 171) |
| HSL | hsl(228, 29%, 53%) |
| OKLCH | oklch(56.8% 0.088 272.6) |
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 #6573AB | 4.57:1 | AA | Lc -77.2 | Fine for body text |
| Black text on #6573AB | 4.59:1 | AA | Lc 32.4 | Non-text elements, placeholder text |
| #6573AB text on white | 4.57:1 | AA | Lc 71.7 | Content text, not long reading |
| #6573AB text on black | 4.59:1 | AA | Lc -30.0 | Dividers and decoration only |
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
#D4D9E8
oklch(88.6% 0.021 271.2)
-
Step 300
300
#B8C0DB
oklch(81% 0.039 272.4)
-
Step 400
400
#939FC9
oklch(70.8% 0.063 272.3)
-
Step 500
500
#7986BB
oklch(63% 0.081 273.3)
-
Step 600
600 (this color)
#6573AB
oklch(56.8% 0.088 272.6)
-
Step 700
700
#515D8F
oklch(49% 0.082 272.8)
-
Step 800
800
#424C74
oklch(42.6% 0.068 272.5)
-
Step 900
900
#38405E
oklch(37.8% 0.053 272.2)
-
Step 950
950
#212537
oklch(26.9% 0.034 274.3)
#6573AB 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) | #6079AD | 0.017 |
| Deuteranopia (no green cones) | #5A73AA | 0.015 |
| Tritanopia (no blue cones) | #4F7E87 | 0.079 |
| Achromatopsia (no color) | #767676 | 0.088 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6573AB
#6573AB
oklch(56.8% 0.088 272.6)
- #897534
#897534
oklch(56.8% 0.088 92.3)
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 #6573AB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Blue #49759C ΔE 0.044
- Stormy Blue #507B9C ΔE 0.045
- Flat Blue #3C73A8 ΔE 0.048
- Off Blue #5684AE ΔE 0.048
- Steel Blue #4682B4 ΔE 0.049
- French Blue #436BAD ΔE 0.050
- Cerulean #457B9D ΔE 0.051
- Cool Blue #4984B8 ΔE 0.052
Use #6573AB 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.