#66829E
Closest named color: Slate Gray (#708090). oklch(59.6% 0.054 248.7), rgb(102, 130, 158).
Aa
Black text reads best on this color (5.25:1).
About this color
#66829E is a medium-dark, muted blue. In OKLCH its lightness is 60%, its chroma 0.054 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Slate Gray (#708090), ΔE 0.023 away. Black text reads best on it, at 5.25:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | muted (0.054) |
| Temperature | cool |
| Nearest name | Slate Gray (#708090) |
| Black text | 5.25:1 |
| White text | 3.99:1 |
Values
| HEX | #66829E |
| RGB | rgb(102, 130, 158) |
| HSL | hsl(210, 22%, 51%) |
| OKLCH | oklch(59.6% 0.054 248.7) |
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 #66829E | 3.99:1 | AA large text | Lc -72.8 | Content text, not long reading |
| Black text on #66829E | 5.25:1 | AA | Lc 36.8 | Non-text elements, placeholder text |
| #66829E text on white | 3.99:1 | AA large text | Lc 67.3 | Content text, not long reading |
| #66829E text on black | 5.25:1 | AA | Lc -34.4 | 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
#F4F6F8
oklch(97.2% 0.003 247.9)
-
Step 100
100
#E6EAEF
oklch(93.5% 0.008 253.9)
-
Step 200
200
#D2DAE3
oklch(88.5% 0.015 251.2)
-
Step 300
300
#B4C2D1
oklch(80.8% 0.026 250)
-
Step 400
400
#8DA3BA
oklch(70.6% 0.042 249.6)
-
Step 500
500 (this color)
#66829E
oklch(59.6% 0.054 248.7)
-
Step 600
600
#587694
oklch(55.4% 0.058 248.9)
-
Step 700
700
#48637F
oklch(49% 0.055 249.9)
-
Step 800
800
#3C5167
oklch(42.7% 0.045 250.1)
-
Step 900
900
#334354
oklch(37.6% 0.036 250.3)
-
Step 950
950
#1E2731
oklch(26.9% 0.023 251.3)
#66829E 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) | #77829F | 0.023 |
| Deuteranopia (no green cones) | #707D9D | 0.018 |
| Tritanopia (no blue cones) | #54888B | 0.045 |
| Achromatopsia (no color) | #7F7F7F | 0.054 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66829E
#66829E
oklch(59.6% 0.054 248.7)
- #94795C
#94795C
oklch(59.4% 0.053 68.5)
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 #66829E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate Gray #708090 ΔE 0.023
- Dusty Blue #5A86AD ΔE 0.025
- Steel #738595 ΔE 0.025
- Grey Blue #647D8E ΔE 0.026
- Off Blue #5684AE ΔE 0.028
- Light Slate Gray #778899 ΔE 0.032
- Steel Grey #6F828A ΔE 0.032
- Lavender Gray #7E7F9A ΔE 0.032
Use #66829E 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.