#669AAE
Closest named color: Cadet Blue (#5F9EA0). oklch(65.7% 0.063 224.2), rgb(102, 154, 174).
Aa
Black text reads best on this color (6.79:1).
About this color
#669AAE is a medium-light, muted teal or cyan. In OKLCH its lightness is 66%, its chroma 0.063 and its hue 224°. Its hue sits on the cool side of the wheel. The nearest named color is Cadet Blue (#5F9EA0), ΔE 0.029 away. Black text reads best on it, at 6.79:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (66%) |
| Chroma | muted (0.063) |
| Temperature | cool |
| Nearest name | Cadet Blue (#5F9EA0) |
| Black text | 6.79:1 |
| White text | 3.08:1 |
Values
| HEX | #669AAE |
| RGB | rgb(102, 154, 174) |
| HSL | hsl(197, 31%, 54%) |
| OKLCH | oklch(65.7% 0.063 224.2) |
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 #669AAE | 3.08:1 | AA large text | Lc -63.1 | Content text, not long reading |
| Black text on #669AAE | 6.79:1 | AA | Lc 46.3 | Large or bold text, headings |
| #669AAE text on white | 3.08:1 | AA large text | Lc 57.8 | Large or bold text, headings |
| #669AAE text on black | 6.79:1 | AA | Lc -44.0 | 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
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E4EBEE
oklch(93.6% 0.009 225.1)
-
Step 200
200
#CEDCE2
oklch(88.6% 0.017 225.2)
-
Step 300
300
#ACC5CF
oklch(80.8% 0.031 223.9)
-
Step 400
400
#80A8B8
oklch(70.8% 0.049 224.4)
-
Step 500
500 (this color)
#669AAE
oklch(65.7% 0.063 224.2)
-
Step 600
600
#437C91
oklch(55.6% 0.068 224.2)
-
Step 700
700
#34687B
oklch(48.9% 0.063 224.3)
-
Step 800
800
#2C5564
oklch(42.6% 0.052 224)
-
Step 900
900
#284652
oklch(37.6% 0.041 225.6)
-
Step 950
950
#182930
oklch(26.9% 0.026 225.8)
#669AAE 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) | #8F97AF | 0.051 |
| Deuteranopia (no green cones) | #848FAE | 0.045 |
| Tritanopia (no blue cones) | #49A0A0 | 0.042 |
| Achromatopsia (no color) | #939393 | 0.063 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #669AAE
#669AAE
oklch(65.7% 0.063 224.2)
- #B38572
#B38572
oklch(65.7% 0.063 43.4)
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 #669AAE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cadet Blue #5F9EA0 ΔE 0.029
- Greyblue #77A1B5 ΔE 0.030
- Blue Grey #758DA3 ΔE 0.037
- Silver Lake Blue #778DA9 ΔE 0.038
- Bluegrey #85A3B2 ΔE 0.047
- Bluey Grey #89A0B0 ΔE 0.047
- Cool Gray #8D99AE ΔE 0.047
- Faded Blue #658CBB ΔE 0.050
Use #669AAE 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.