#668FD0
Closest named color: Faded Blue (#658CBB). oklch(64.8% 0.108 259.3), rgb(102, 143, 208).
Aa
Black text reads best on this color (6.40:1).
About this color
#668FD0 is a medium-light, moderately saturated blue. In OKLCH its lightness is 65%, its chroma 0.108 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.031 away. Black text reads best on it, at 6.40:1.
| Hue family | Blues |
| Lightness | medium-light (65%) |
| Chroma | moderately saturated (0.108) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.40:1 |
| White text | 3.27:1 |
Values
| HEX | #668FD0 |
| RGB | rgb(102, 143, 208) |
| HSL | hsl(217, 53%, 61%) |
| OKLCH | oklch(64.8% 0.108 259.3) |
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 #668FD0 | 3.27:1 | AA large text | Lc -65.4 | Content text, not long reading |
| Black text on #668FD0 | 6.40:1 | AA | Lc 44.1 | Non-text elements, placeholder text |
| #668FD0 text on white | 3.27:1 | AA large text | Lc 60.0 | Content text, not long reading |
| #668FD0 text on black | 6.40:1 | AA | Lc -41.7 | 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
#E4EAF4
oklch(93.5% 0.015 260.7)
-
Step 200
200
#CEDAED
oklch(88.5% 0.029 259.6)
-
Step 300
300
#ADC2E3
oklch(80.9% 0.052 259.4)
-
Step 400
400
#81A2D6
oklch(70.7% 0.085 259.3)
-
Step 500
500 (this color)
#668FD0
oklch(64.8% 0.108 259.3)
-
Step 600
600
#4873B7
oklch(55.6% 0.117 259.2)
-
Step 700
700
#39609E
oklch(49.1% 0.109 259.3)
-
Step 800
800
#304F80
oklch(42.8% 0.09 259.2)
-
Step 900
900
#2A4267
oklch(37.8% 0.07 258.8)
-
Step 950
950
#19273C
oklch(27.1% 0.044 258.3)
#668FD0 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) | #7693D3 | 0.023 |
| Deuteranopia (no green cones) | #6989CF | 0.016 |
| Tritanopia (no blue cones) | #339DA6 | 0.096 |
| Achromatopsia (no color) | #8E8E8E | 0.108 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #668FD0
#668FD0
oklch(64.8% 0.108 259.3)
- #B18638
#B18638
oklch(64.7% 0.108 79.5)
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 #668FD0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.031
- Cornflower Blue #6495ED ΔE 0.043
- Dark Sky Blue #448EE4 ΔE 0.043
- Soft Blue #6488EA ΔE 0.047
- Chefchaouen Blue #4895EF ΔE 0.050
- Cool Blue #4984B8 ΔE 0.057
- Dusty Blue #5A86AD ΔE 0.058
- Off Blue #5684AE ΔE 0.060
Use #668FD0 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.