#6581BB
Closest named color: Off Blue (#5684AE). oklch(60.6% 0.095 264.1), rgb(101, 129, 187).
Aa
Black text reads best on this color (5.41:1).
About this color
#6581BB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 61%, its chroma 0.095 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Off Blue (#5684AE), ΔE 0.030 away. Black text reads best on it, at 5.41:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | moderately saturated (0.095) |
| Temperature | cool |
| Nearest name | Off Blue (#5684AE) |
| Black text | 5.41:1 |
| White text | 3.88:1 |
Values
| HEX | #6581BB |
| RGB | rgb(101, 129, 187) |
| HSL | hsl(220, 39%, 56%) |
| OKLCH | oklch(60.6% 0.095 264.1) |
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 #6581BB | 3.88:1 | AA large text | Lc -71.7 | Content text, not long reading |
| Black text on #6581BB | 5.41:1 | AA | Lc 37.9 | Non-text elements, placeholder text |
| #6581BB text on white | 3.88:1 | AA large text | Lc 66.2 | Content text, not long reading |
| #6581BB text on black | 5.41:1 | AA | Lc -35.5 | 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 500.
-
Step 50
50
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E5EAF3
oklch(93.6% 0.013 262.4)
-
Step 200
200
#D1D9EB
oklch(88.5% 0.026 266.6)
-
Step 300
300
#B2C1DF
oklch(80.9% 0.046 264.3)
-
Step 400
400
#89A1D0
oklch(70.8% 0.074 263.5)
-
Step 500
500 (this color)
#6581BB
oklch(60.6% 0.095 264.1)
-
Step 600
600
#5472B0
oklch(55.7% 0.103 263.8)
-
Step 700
700
#455F97
oklch(49.1% 0.096 264.3)
-
Step 800
800
#394E7A
oklch(42.8% 0.078 264)
-
Step 900
900
#314163
oklch(37.8% 0.062 264.4)
-
Step 950
950
#1D263A
oklch(27% 0.04 265.3)
#6581BB 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) | #6C86BD | 0.017 |
| Deuteranopia (no green cones) | #637EBA | 0.009 |
| Tritanopia (no blue cones) | #448D96 | 0.084 |
| Achromatopsia (no color) | #818181 | 0.095 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6581BB
#6581BB
oklch(60.6% 0.095 264.1)
- #9D7D39
#9D7D39
oklch(60.7% 0.095 83.9)
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 #6581BB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Off Blue #5684AE ΔE 0.030
- Faded Blue #658CBB ΔE 0.031
- Cool Blue #4984B8 ΔE 0.031
- Dusty Blue #5A86AD ΔE 0.032
- Steel Blue #4682B4 ΔE 0.036
- Silver Lake Blue #778DA9 ΔE 0.056
- Stormy Blue #507B9C ΔE 0.057
- Windows Blue #3778BF ΔE 0.058
Use #6581BB 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.