#668DC2
Closest named color: Faded Blue (#658CBB). oklch(63.6% 0.091 256.3), rgb(102, 141, 194).
Aa
Black text reads best on this color (6.15:1).
About this color
#668DC2 is a medium-light, moderately saturated blue. In OKLCH its lightness is 64%, its chroma 0.091 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.011 away. Black text reads best on it, at 6.15:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.091) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.15:1 |
| White text | 3.41:1 |
Values
| HEX | #668DC2 |
| RGB | rgb(102, 141, 194) |
| HSL | hsl(215, 43%, 58%) |
| OKLCH | oklch(63.6% 0.091 256.3) |
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 #668DC2 | 3.41:1 | AA large text | Lc -67.0 | Content text, not long reading |
| Black text on #668DC2 | 6.15:1 | AA | Lc 42.5 | Non-text elements, placeholder text |
| #668DC2 text on white | 3.41:1 | AA large text | Lc 61.5 | Content text, not long reading |
| #668DC2 text on black | 6.15:1 | AA | Lc -40.2 | 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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E4EAF3
oklch(93.5% 0.014 258.3)
-
Step 200
200
#CFDAEA
oklch(88.5% 0.025 257.6)
-
Step 300
300
#AEC2DE
oklch(80.8% 0.045 256.8)
-
Step 400
400
#84A3CD
oklch(70.8% 0.071 256.1)
-
Step 500
500 (this color)
#668DC2
oklch(63.6% 0.091 256.3)
-
Step 600
600
#4B75AD
oklch(55.7% 0.1 256)
-
Step 700
700
#3C6294
oklch(49.1% 0.092 255.8)
-
Step 800
800
#325078
oklch(42.7% 0.076 256)
-
Step 900
900
#2C4361
oklch(37.8% 0.059 255.5)
-
Step 950
950
#1A2739
oklch(27% 0.038 256.7)
#668DC2 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) | #7990C4 | 0.026 |
| Deuteranopia (no green cones) | #6E87C1 | 0.018 |
| Tritanopia (no blue cones) | #3F999F | 0.082 |
| Achromatopsia (no color) | #8B8B8B | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #668DC2
#668DC2
oklch(63.6% 0.091 256.3)
- #AB8348
#AB8348
oklch(63.6% 0.091 75.6)
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 #668DC2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.011
- Dusty Blue #5A86AD ΔE 0.038
- Silver Lake Blue #778DA9 ΔE 0.042
- Off Blue #5684AE ΔE 0.042
- Cool Blue #4984B8 ΔE 0.044
- Blue Grey #758DA3 ΔE 0.050
- Steel Blue #4682B4 ΔE 0.052
- Dark Sky Blue #448EE4 ΔE 0.058
Use #668DC2 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.