#668AAA
Closest named color: Dusty Blue (#5A86AD). oklch(61.9% 0.063 245.9), rgb(102, 138, 170).
Aa
Black text reads best on this color (5.78:1).
About this color
#668AAA is a medium-dark, muted blue. In OKLCH its lightness is 62%, its chroma 0.063 and its hue 246°. Its hue sits on the cool side of the wheel. The nearest named color is Dusty Blue (#5A86AD), ΔE 0.020 away. Black text reads best on it, at 5.78:1.
| Hue family | Blues |
| Lightness | medium-dark (62%) |
| Chroma | muted (0.063) |
| Temperature | cool |
| Nearest name | Dusty Blue (#5A86AD) |
| Black text | 5.78:1 |
| White text | 3.63:1 |
Values
| HEX | #668AAA |
| RGB | rgb(102, 138, 170) |
| HSL | hsl(208, 29%, 53%) |
| OKLCH | oklch(61.9% 0.063 245.9) |
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 #668AAA | 3.63:1 | AA large text | Lc -69.4 | Content text, not long reading |
| Black text on #668AAA | 5.78:1 | AA | Lc 40.2 | Non-text elements, placeholder text |
| #668AAA text on white | 3.63:1 | AA large text | Lc 63.9 | Content text, not long reading |
| #668AAA text on black | 5.78:1 | AA | Lc -37.8 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E5EBF0
oklch(93.7% 0.009 242.8)
-
Step 200
200
#D0DBE4
oklch(88.6% 0.017 242.5)
-
Step 300
300
#B1C3D4
oklch(80.9% 0.031 246.7)
-
Step 400
400
#88A4BE
oklch(70.7% 0.049 246.6)
-
Step 500
500 (this color)
#668AAA
oklch(61.9% 0.063 245.9)
-
Step 600
600
#517799
oklch(55.5% 0.068 246.4)
-
Step 700
700
#416483
oklch(49% 0.064 246.3)
-
Step 800
800
#36526A
oklch(42.7% 0.052 245.3)
-
Step 900
900
#2F4456
oklch(37.7% 0.041 245)
-
Step 950
950
#1C2833
oklch(27.1% 0.026 246.6)
#668AAA 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) | #7D8AAC | 0.030 |
| Deuteranopia (no green cones) | #7483A9 | 0.025 |
| Tritanopia (no blue cones) | #4E9295 | 0.053 |
| Achromatopsia (no color) | #868686 | 0.063 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #668AAA
#668AAA
oklch(61.9% 0.063 245.9)
- #A07E5D
#A07E5D
oklch(61.8% 0.063 65.4)
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 #668AAA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusty Blue #5A86AD ΔE 0.020
- Silver Lake Blue #778DA9 ΔE 0.024
- Blue Grey #758DA3 ΔE 0.024
- Faded Blue #658CBB ΔE 0.025
- Off Blue #5684AE ΔE 0.028
- Light Slate Gray #778899 ΔE 0.031
- Steel #738595 ΔE 0.033
- Slate Gray #708090 ΔE 0.042
Use #668AAA 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.