#668DD3
Closest named color: Faded Blue (#658CBB). oklch(64.5% 0.114 261.5), rgb(102, 141, 211).
Aa
Black text reads best on this color (6.31:1).
About this color
#668DD3 is a medium-light, moderately saturated blue. In OKLCH its lightness is 64%, its chroma 0.114 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 6.31:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.114) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.31:1 |
| White text | 3.32:1 |
Values
| HEX | #668DD3 |
| RGB | rgb(102, 141, 211) |
| HSL | hsl(219, 55%, 61%) |
| OKLCH | oklch(64.5% 0.114 261.5) |
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 #668DD3 | 3.32:1 | AA large text | Lc -66.0 | Content text, not long reading |
| Black text on #668DD3 | 6.31:1 | AA | Lc 43.5 | Non-text elements, placeholder text |
| #668DD3 text on white | 3.32:1 | AA large text | Lc 60.5 | Content text, not long reading |
| #668DD3 text on black | 6.31:1 | AA | Lc -41.2 | 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
#CEDAEE
oklch(88.5% 0.03 260.7)
-
Step 300
300
#ADC2E6
oklch(81% 0.056 261.2)
-
Step 400
400
#82A1D9
oklch(70.7% 0.09 261.9)
-
Step 500
500 (this color)
#668DD3
oklch(64.5% 0.114 261.5)
-
Step 600
600
#4971BB
oklch(55.5% 0.124 261.7)
-
Step 700
700
#3A5FA2
oklch(49.2% 0.116 261.3)
-
Step 800
800
#304E83
oklch(42.8% 0.095 261)
-
Step 900
900
#2B4169
oklch(37.7% 0.074 261.6)
-
Step 950
950
#19263D
oklch(26.9% 0.047 261.3)
#668DD3 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) | #7292D6 | 0.021 |
| Deuteranopia (no green cones) | #6588D1 | 0.014 |
| Tritanopia (no blue cones) | #309CA6 | 0.102 |
| Achromatopsia (no color) | #8D8D8D | 0.114 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #668DD3
#668DD3
oklch(64.5% 0.114 261.5)
- #B0862F
#B0862F
oklch(64.5% 0.114 82)
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 #668DD3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.037
- Dark Sky Blue #448EE4 ΔE 0.039
- Soft Blue #6488EA ΔE 0.040
- Cornflower Blue #6495ED ΔE 0.040
- Chefchaouen Blue #4895EF ΔE 0.048
- Cool Blue #4984B8 ΔE 0.057
- Dusty Blue #5A86AD ΔE 0.061
- Off Blue #5684AE ΔE 0.062
Use #668DD3 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.