#669D9D
Closest named color: Cadet Blue (#5F9EA0). oklch(65.8% 0.058 195.8), rgb(102, 157, 157).
Aa
Black text reads best on this color (6.87:1).
About this color
#669D9D is a medium-light, muted teal or cyan. In OKLCH its lightness is 66%, its chroma 0.058 and its hue 196°. Its hue sits on the cool side of the wheel. The nearest named color is Cadet Blue (#5F9EA0), ΔE 0.008 away. Black text reads best on it, at 6.87:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (66%) |
| Chroma | muted (0.058) |
| Temperature | cool |
| Nearest name | Cadet Blue (#5F9EA0) |
| Black text | 6.87:1 |
| White text | 3.05:1 |
Values
| HEX | #669D9D |
| RGB | rgb(102, 157, 157) |
| HSL | hsl(180, 22%, 51%) |
| OKLCH | oklch(65.8% 0.058 195.8) |
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 #669D9D | 3.05:1 | AA large text | Lc -62.7 | Content text, not long reading |
| Black text on #669D9D | 6.87:1 | AA | Lc 46.7 | Large or bold text, headings |
| #669D9D text on white | 3.05:1 | AA large text | Lc 57.3 | Large or bold text, headings |
| #669D9D text on black | 6.87:1 | AA | Lc -44.4 | 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
#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
#80AAAA
oklch(70.8% 0.045 196.2)
-
Step 500
500 (this color)
#669D9D
oklch(65.8% 0.058 195.8)
-
Step 600
600
#427F7F
oklch(55.6% 0.063 195.5)
-
Step 700
700
#346B6B
oklch(49.1% 0.058 195.4)
-
Step 800
800
#2C5758
oklch(42.6% 0.048 197.5)
-
Step 900
900
#284848
oklch(37.7% 0.038 195.7)
-
Step 950
950
#182A2A
oklch(26.9% 0.024 195.8)
#669D9D 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) | #96989D | 0.060 |
| Deuteranopia (no green cones) | #8C909E | 0.057 |
| Tritanopia (no blue cones) | #50A09D | 0.021 |
| Achromatopsia (no color) | #939393 | 0.058 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #669D9D
#669D9D
oklch(65.8% 0.058 195.8)
- #B28386
#B28386
oklch(65.7% 0.058 14.5)
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 #669D9D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cadet Blue #5F9EA0 ΔE 0.008
- Dull Teal #5F9E8F ΔE 0.024
- Grey Teal #5E9B8A ΔE 0.030
- Greyblue #77A1B5 ΔE 0.042
- Sea #3C9992 ΔE 0.045
- Blue Grey #758DA3 ΔE 0.052
- Bluegrey #85A3B2 ΔE 0.052
- Bluey Grey #89A0B0 ΔE 0.053
Use #669D9D 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.