#669AC4
Closest named color: Faded Blue (#658CBB). oklch(66.6% 0.084 243.9), rgb(102, 154, 196).
Aa
Black text reads best on this color (6.98:1).
About this color
#669AC4 is a medium-light, moderately saturated blue. In OKLCH its lightness is 67%, its chroma 0.084 and its hue 244°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.039 away. Black text reads best on it, at 6.98:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.084) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.98:1 |
| White text | 3.00:1 |
Values
| HEX | #669AC4 |
| RGB | rgb(102, 154, 196) |
| HSL | hsl(207, 44%, 58%) |
| OKLCH | oklch(66.6% 0.084 243.9) |
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 #669AC4 | 3.00:1 | AA large text | Lc -62.0 | Content text, not long reading |
| Black text on #669AC4 | 6.98:1 | AA | Lc 47.4 | Large or bold text, headings |
| #669AC4 text on white | 3.00:1 | AA large text | Lc 56.7 | Large or bold text, headings |
| #669AC4 text on black | 6.98:1 | AA | Lc -45.1 | Large or bold text, headings |
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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E3EBF1
oklch(93.6% 0.012 239.9)
-
Step 200
200
#CDDBE7
oklch(88.4% 0.022 243.8)
-
Step 300
300
#ABC4DA
oklch(80.9% 0.041 244.9)
-
Step 400
400
#7EA6C7
oklch(70.8% 0.065 243.8)
-
Step 500
500 (this color)
#669AC4
oklch(66.6% 0.084 243.9)
-
Step 600
600
#4079A5
oklch(55.7% 0.091 243.8)
-
Step 700
700
#32658D
oklch(49% 0.085 244.5)
-
Step 800
800
#2A5373
oklch(42.7% 0.071 244.1)
-
Step 900
900
#27455D
oklch(37.8% 0.055 244.1)
-
Step 950
950
#172836
oklch(26.9% 0.035 244.4)
#669AC4 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) | #889AC6 | 0.041 |
| Deuteranopia (no green cones) | #7C90C3 | 0.035 |
| Tritanopia (no blue cones) | #3BA4A8 | 0.069 |
| Achromatopsia (no color) | #959595 | 0.084 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #669AC4
#669AC4
oklch(66.6% 0.084 243.9)
- #B9895C
#B9895C
oklch(66.7% 0.084 63.7)
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 #669AC4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.039
- Greyblue #77A1B5 ΔE 0.039
- Silver Lake Blue #778DA9 ΔE 0.047
- Blue Grey #758DA3 ΔE 0.053
- Cool Gray #8D99AE ΔE 0.054
- Bluegrey #85A3B2 ΔE 0.056
- Bluey Grey #89A0B0 ΔE 0.056
- Cadet Blue #5F9EA0 ΔE 0.061
Use #669AC4 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.