#669DC9
Closest named color: Greyblue (#77A1B5). oklch(67.5% 0.088 243.7), rgb(102, 157, 201).
Aa
Black text reads best on this color (7.23:1).
About this color
#669DC9 is a medium-light, moderately saturated blue. In OKLCH its lightness is 68%, its chroma 0.088 and its hue 244°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.039 away. Black text reads best on it, at 7.23:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | moderately saturated (0.088) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 7.23:1 |
| White text | 2.90:1 |
Values
| HEX | #669DC9 |
| RGB | rgb(102, 157, 201) |
| HSL | hsl(207, 48%, 59%) |
| OKLCH | oklch(67.5% 0.088 243.7) |
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 #669DC9 | 2.90:1 | Fails | Lc -60.6 | Content text, not long reading |
| Black text on #669DC9 | 7.23:1 | AAA | Lc 48.8 | Large or bold text, headings |
| #669DC9 text on white | 2.90:1 | Fails | Lc 55.3 | Large or bold text, headings |
| #669DC9 text on black | 7.23:1 | AAA | Lc -46.5 | 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 400.
-
Step 50
50
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E1EBF4
oklch(93.5% 0.016 245.1)
-
Step 200
200
#C9DCEC
oklch(88.5% 0.03 243.4)
-
Step 300
300
#A3C5E2
oklch(80.8% 0.055 244.3)
-
Step 400
400 (this color)
#669DC9
oklch(67.5% 0.088 243.7)
-
Step 500
500
#4690C8
oklch(63.1% 0.112 243.9)
-
Step 600
600
#2279B5
oklch(55.5% 0.122 244.2)
-
Step 700
700
#12669C
oklch(49.1% 0.114 243.9)
-
Step 800
800
#14537E
oklch(42.6% 0.094 244)
-
Step 900
900
#194565
oklch(37.6% 0.073 243.7)
-
Step 950
950
#10293B
oklch(27.1% 0.046 242.4)
#669DC9 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) | #8A9DCB | 0.043 |
| Deuteranopia (no green cones) | #7D93C8 | 0.035 |
| Tritanopia (no blue cones) | #36A8AC | 0.073 |
| Achromatopsia (no color) | #979797 | 0.088 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #669DC9
#669DC9
oklch(67.5% 0.088 243.7)
- #BD8B5C
#BD8B5C
oklch(67.5% 0.088 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 #669DC9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.039
- Faded Blue #658CBB ΔE 0.047
- Bluegrey #85A3B2 ΔE 0.055
- Bluey Grey #89A0B0 ΔE 0.056
- Silver Lake Blue #778DA9 ΔE 0.056
- Cool Gray #8D99AE ΔE 0.057
- Blue Grey #758DA3 ΔE 0.062
- Cornflower Blue #6495ED ΔE 0.064
Use #669DC9 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.