#668CC2
Closest named color: Faded Blue (#658CBB). oklch(63.4% 0.092 257.2), rgb(102, 140, 194).
Aa
Black text reads best on this color (6.09:1).
About this color
#668CC2 is a medium-light, moderately saturated blue. In OKLCH its lightness is 63%, its chroma 0.092 and its hue 257°. 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 6.09:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.092) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.09:1 |
| White text | 3.44:1 |
Values
| HEX | #668CC2 |
| RGB | rgb(102, 140, 194) |
| HSL | hsl(215, 43%, 58%) |
| OKLCH | oklch(63.4% 0.092 257.2) |
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 #668CC2 | 3.44:1 | AA large text | Lc -67.4 | Content text, not long reading |
| Black text on #668CC2 | 6.09:1 | AA | Lc 42.2 | Non-text elements, placeholder text |
| #668CC2 text on white | 3.44:1 | AA large text | Lc 61.9 | Content text, not long reading |
| #668CC2 text on black | 6.09:1 | AA | Lc -39.8 | 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
#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
#AFC2DE
oklch(80.9% 0.045 258)
-
Step 400
400
#84A3CE
oklch(70.8% 0.072 256.6)
-
Step 500
500 (this color)
#668CC2
oklch(63.4% 0.092 257.2)
-
Step 600
600
#4C74AD
oklch(55.5% 0.1 257.3)
-
Step 700
700
#3D6195
oklch(49% 0.094 257.6)
-
Step 800
800
#335079
oklch(42.8% 0.077 257.2)
-
Step 900
900
#2C4261
oklch(37.6% 0.06 257)
-
Step 950
950
#1A2739
oklch(27% 0.038 256.7)
#668CC2 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) | #778FC4 | 0.023 |
| Deuteranopia (no green cones) | #6D86C1 | 0.017 |
| Tritanopia (no blue cones) | #3F989F | 0.082 |
| Achromatopsia (no color) | #8A8A8A | 0.092 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #668CC2
#668CC2
oklch(63.4% 0.092 257.2)
- #AA8346
#AA8346
oklch(63.5% 0.092 77)
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 #668CC2, 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
- Off Blue #5684AE ΔE 0.041
- Cool Blue #4984B8 ΔE 0.043
- Silver Lake Blue #778DA9 ΔE 0.043
- Steel Blue #4682B4 ΔE 0.050
- Blue Grey #758DA3 ΔE 0.051
- Dark Sky Blue #448EE4 ΔE 0.057
Use #668CC2 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.