#668BC2
Closest named color: Faded Blue (#658CBB). oklch(63.2% 0.093 258.1), rgb(102, 139, 194).
Aa
Black text reads best on this color (6.03:1).
About this color
#668BC2 is a medium-light, moderately saturated blue. In OKLCH its lightness is 63%, its chroma 0.093 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.012 away. Black text reads best on it, at 6.03:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.093) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.03:1 |
| White text | 3.47:1 |
Values
| HEX | #668BC2 |
| RGB | rgb(102, 139, 194) |
| HSL | hsl(216, 43%, 58%) |
| OKLCH | oklch(63.2% 0.093 258.1) |
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 #668BC2 | 3.47:1 | AA large text | Lc -67.7 | Content text, not long reading |
| Black text on #668BC2 | 6.03:1 | AA | Lc 41.8 | Non-text elements, placeholder text |
| #668BC2 text on white | 3.47:1 | AA large text | Lc 62.3 | Content text, not long reading |
| #668BC2 text on black | 6.03:1 | AA | Lc -39.4 | 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
#F3F6FA
oklch(97.2% 0.006 255.5)
-
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
#AFC2DF
oklch(80.9% 0.046 258.8)
-
Step 400
400
#85A2CE
oklch(70.7% 0.072 258.6)
-
Step 500
500 (this color)
#668BC2
oklch(63.2% 0.093 258.1)
-
Step 600
600
#4D74AE
oklch(55.6% 0.101 258.1)
-
Step 700
700
#3E6196
oklch(49.1% 0.095 258.5)
-
Step 800
800
#334F79
oklch(42.6% 0.078 258.3)
-
Step 900
900
#2D4262
oklch(37.7% 0.061 258.6)
-
Step 950
950
#1B2739
oklch(27.1% 0.038 258.3)
#668BC2 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) | #768EC4 | 0.022 |
| Deuteranopia (no green cones) | #6B85C1 | 0.017 |
| Tritanopia (no blue cones) | #40979E | 0.083 |
| Achromatopsia (no color) | #898989 | 0.093 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #668BC2
#668BC2
oklch(63.2% 0.093 258.1)
- #A98244
#A98244
oklch(63.1% 0.093 77.3)
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 #668BC2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.012
- Dusty Blue #5A86AD ΔE 0.037
- Off Blue #5684AE ΔE 0.040
- Cool Blue #4984B8 ΔE 0.041
- Silver Lake Blue #778DA9 ΔE 0.044
- Steel Blue #4682B4 ΔE 0.049
- Blue Grey #758DA3 ΔE 0.052
- Dark Sky Blue #448EE4 ΔE 0.057
Use #668BC2 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.