#669F9D
Closest named color: Cadet Blue (#5F9EA0). oklch(66.3% 0.06 193), rgb(102, 159, 157).
Aa
Black text reads best on this color (7.01:1).
About this color
#669F9D is a medium-light, muted teal or cyan. In OKLCH its lightness is 66%, its chroma 0.060 and its hue 193°. Its hue sits on the cool side of the wheel. The nearest named color is Cadet Blue (#5F9EA0), ΔE 0.009 away. Black text reads best on it, at 7.01:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (66%) |
| Chroma | muted (0.060) |
| Temperature | cool |
| Nearest name | Cadet Blue (#5F9EA0) |
| Black text | 7.01:1 |
| White text | 2.99:1 |
Values
| HEX | #669F9D |
| RGB | rgb(102, 159, 157) |
| HSL | hsl(178, 23%, 51%) |
| OKLCH | oklch(66.3% 0.06 193) |
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 #669F9D | 2.99:1 | Fails | Lc -61.9 | Content text, not long reading |
| Black text on #669F9D | 7.01:1 | AAA | Lc 47.5 | Large or bold text, headings |
| #669F9D text on white | 2.99:1 | Fails | Lc 56.5 | Large or bold text, headings |
| #669F9D text on black | 7.01:1 | AAA | Lc -45.2 | 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
#F3F6F6
oklch(97.1% 0.003 197.1)
-
Step 100
100
#E4ECEB
oklch(93.7% 0.009 188.1)
-
Step 200
200
#CEDDDC
oklch(88.6% 0.016 192)
-
Step 300
300
#ACC7C6
oklch(80.9% 0.029 193.9)
-
Step 400
400
#7FAAA8
oklch(70.6% 0.046 192.6)
-
Step 500
500 (this color)
#669F9D
oklch(66.3% 0.06 193)
-
Step 600
600
#40807E
oklch(55.7% 0.066 192.7)
-
Step 700
700
#326C6A
oklch(49.2% 0.061 192.4)
-
Step 800
800
#2A5856
oklch(42.7% 0.051 191.7)
-
Step 900
900
#274847
oklch(37.6% 0.039 193.1)
-
Step 950
950
#172A2A
oklch(26.9% 0.025 195.8)
#669F9D 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) | #989A9D | 0.062 |
| Deuteranopia (no green cones) | #8E929E | 0.059 |
| Tritanopia (no blue cones) | #50A29E | 0.021 |
| Achromatopsia (no color) | #959595 | 0.060 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #669F9D
#669F9D
oklch(66.3% 0.06 193)
- #B58489
#B58489
oklch(66.3% 0.061 12.1)
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 #669F9D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cadet Blue #5F9EA0 ΔE 0.009
- Dull Teal #5F9E8F ΔE 0.023
- Grey Teal #5E9B8A ΔE 0.030
- Greyblue #77A1B5 ΔE 0.042
- Sea #3C9992 ΔE 0.046
- Bluegrey #85A3B2 ΔE 0.051
- Bluey Grey #89A0B0 ΔE 0.053
- Persian Green #2A9D8F ΔE 0.054
Use #669F9D 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.