#3B657B
Closest named color: Slate (#516572). oklch(48.5% 0.059 232.6), rgb(59, 101, 123).
Aa
White text reads best on this color (6.29:1).
About this color
#3B657B is a medium-dark, muted blue. In OKLCH its lightness is 49%, its chroma 0.059 and its hue 233°. Its hue sits on the cool side of the wheel. The nearest named color is Slate (#516572), ΔE 0.029 away. White text reads best on it, at 6.29:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | muted (0.059) |
| Temperature | cool |
| Nearest name | Slate (#516572) |
| Black text | 3.33:1 |
| White text | 6.29:1 |
Values
| HEX | #3B657B |
| RGB | rgb(59, 101, 123) |
| HSL | hsl(201, 35%, 36%) |
| OKLCH | oklch(48.5% 0.059 232.6) |
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 #3B657B | 6.29:1 | AA | Lc -86.4 | Fine for body text |
| Black text on #3B657B | 3.33:1 | AA large text | Lc 22.8 | Dividers and decoration only |
| #3B657B text on white | 6.29:1 | AA | Lc 81.3 | Fine for body text |
| #3B657B text on black | 3.33:1 | AA large text | Lc -20.6 | Dividers and decoration only |
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 700.
-
Step 50
50
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E5EBEE
oklch(93.6% 0.008 228.9)
-
Step 200
200
#CFDBE2
oklch(88.4% 0.016 233)
-
Step 300
300
#AFC4D0
oklch(80.8% 0.029 232.8)
-
Step 400
400
#85A6B9
oklch(70.7% 0.046 233.5)
-
Step 500
500
#6590A7
oklch(63.1% 0.058 232.3)
-
Step 600
600
#4C7A92
oklch(55.6% 0.063 232.2)
-
Step 700
700 (this color)
#3B657B
oklch(48.5% 0.059 232.6)
-
Step 800
800
#325465
oklch(42.7% 0.049 231.2)
-
Step 900
900
#2D4553
oklch(37.7% 0.038 234.8)
-
Step 950
950
#1A2930
oklch(27.1% 0.024 228.7)
#3B657B 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) | #5A647C | 0.039 |
| Deuteranopia (no green cones) | #515D7B | 0.034 |
| Tritanopia (no blue cones) | #196B6C | 0.044 |
| Achromatopsia (no color) | #606060 | 0.059 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B657B
#3B657B
oklch(48.5% 0.059 232.6)
- #7A563F
#7A563F
oklch(48.6% 0.059 53.4)
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 #3B657B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.029
- Denim #3B638C ΔE 0.030
- YInMn Blue #415A77 ΔE 0.032
- Light Navy Blue #2E5A88 ΔE 0.047
- Dark Aqua #05696B ΔE 0.048
- Dusty Grape #545775 ΔE 0.048
- Peacock Blue #016795 ΔE 0.049
- Dusky Blue #475F94 ΔE 0.051
Use #3B657B 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.