#668CD3
Closest named color: Faded Blue (#658CBB). oklch(64.3% 0.115 262.2), rgb(102, 140, 211).
Aa
Black text reads best on this color (6.25:1).
About this color
#668CD3 is a medium-light, moderately saturated blue. In OKLCH its lightness is 64%, its chroma 0.115 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.037 away. Black text reads best on it, at 6.25:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.115) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.25:1 |
| White text | 3.35:1 |
Values
| HEX | #668CD3 |
| RGB | rgb(102, 140, 211) |
| HSL | hsl(219, 55%, 61%) |
| OKLCH | oklch(64.3% 0.115 262.2) |
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 #668CD3 | 3.35:1 | AA large text | Lc -66.3 | Content text, not long reading |
| Black text on #668CD3 | 6.25:1 | AA | Lc 43.2 | Non-text elements, placeholder text |
| #668CD3 text on white | 3.35:1 | AA large text | Lc 60.9 | Content text, not long reading |
| #668CD3 text on black | 6.25:1 | AA | Lc -40.8 | 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
#F3F6FB
oklch(97.2% 0.007 260.7)
-
Step 100
100
#E4EAF5
oklch(93.6% 0.016 262.8)
-
Step 200
200
#CEDAEF
oklch(88.6% 0.032 261.7)
-
Step 300
300
#ADC1E6
oklch(80.8% 0.057 262.7)
-
Step 400
400
#82A1D9
oklch(70.7% 0.09 261.9)
-
Step 500
500 (this color)
#668CD3
oklch(64.3% 0.115 262.2)
-
Step 600
600
#4A71BC
oklch(55.6% 0.125 262.3)
-
Step 700
700
#3B5EA2
oklch(49% 0.117 262.4)
-
Step 800
800
#314D83
oklch(42.6% 0.096 262.4)
-
Step 900
900
#2B4169
oklch(37.7% 0.074 261.6)
-
Step 950
950
#19263E
oklch(27% 0.049 262)
#668CD3 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) | #7092D6 | 0.021 |
| Deuteranopia (no green cones) | #6388D1 | 0.012 |
| Tritanopia (no blue cones) | #319BA6 | 0.102 |
| Achromatopsia (no color) | #8C8C8C | 0.115 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #668CD3
#668CD3
oklch(64.3% 0.115 262.2)
- #B0852C
#B0852C
oklch(64.3% 0.115 81.7)
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 #668CD3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.037
- Soft Blue #6488EA ΔE 0.039
- Dark Sky Blue #448EE4 ΔE 0.039
- Cornflower Blue #6495ED ΔE 0.041
- Chefchaouen Blue #4895EF ΔE 0.048
- Cool Blue #4984B8 ΔE 0.056
- Dusty Blue #5A86AD ΔE 0.060
- Off Blue #5684AE ΔE 0.062
Use #668CD3 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.