#669BB5
Closest named color: Greyblue (#77A1B5). oklch(66.2% 0.068 230.3), rgb(102, 155, 181).
Aa
Black text reads best on this color (6.92:1).
About this color
#669BB5 is a medium-light, muted blue. In OKLCH its lightness is 66%, its chroma 0.068 and its hue 230°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.027 away. Black text reads best on it, at 6.92:1.
| Hue family | Blues |
| Lightness | medium-light (66%) |
| Chroma | muted (0.068) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 6.92:1 |
| White text | 3.03:1 |
Values
| HEX | #669BB5 |
| RGB | rgb(102, 155, 181) |
| HSL | hsl(200, 35%, 55%) |
| OKLCH | oklch(66.2% 0.068 230.3) |
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 #669BB5 | 3.03:1 | AA large text | Lc -62.4 | Content text, not long reading |
| Black text on #669BB5 | 6.92:1 | AA | Lc 47.0 | Large or bold text, headings |
| #669BB5 text on white | 3.03:1 | AA large text | Lc 57.0 | Large or bold text, headings |
| #669BB5 text on black | 6.92:1 | AA | Lc -44.7 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E4EBEF
oklch(93.6% 0.009 232.4)
-
Step 200
200
#CDDCE3
oklch(88.5% 0.019 227.3)
-
Step 300
300
#ACC5D2
oklch(80.9% 0.033 230.4)
-
Step 400
400
#7FA7BC
oklch(70.7% 0.053 231.3)
-
Step 500
500 (this color)
#669BB5
oklch(66.2% 0.068 230.3)
-
Step 600
600
#417B97
oklch(55.5% 0.075 231.1)
-
Step 700
700
#336880
oklch(49.1% 0.068 229.8)
-
Step 800
800
#2B5568
oklch(42.8% 0.056 229.4)
-
Step 900
900
#274655
oklch(37.7% 0.045 230.6)
-
Step 950
950
#182932
oklch(27% 0.028 232.3)
#669BB5 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) | #8E99B6 | 0.049 |
| Deuteranopia (no green cones) | #8390B5 | 0.044 |
| Tritanopia (no blue cones) | #45A2A3 | 0.049 |
| Achromatopsia (no color) | #949494 | 0.068 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #669BB5
#669BB5
oklch(66.2% 0.068 230.3)
- #B5876D
#B5876D
oklch(66.2% 0.068 50.6)
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 #669BB5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.027
- Cadet Blue #5F9EA0 ΔE 0.037
- Silver Lake Blue #778DA9 ΔE 0.040
- Blue Grey #758DA3 ΔE 0.042
- Bluegrey #85A3B2 ΔE 0.046
- Bluey Grey #89A0B0 ΔE 0.046
- Cool Gray #8D99AE ΔE 0.047
- Faded Blue #658CBB ΔE 0.047
Use #669BB5 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.