#3F6174
Closest named color: YInMn Blue (#415A77). oklch(47.4% 0.05 233.8), rgb(63, 97, 116).
Aa
White text reads best on this color (6.61:1).
About this color
#3F6174 is a medium-dark, muted blue. In OKLCH its lightness is 47%, its chroma 0.050 and its hue 234°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.024 away. White text reads best on it, at 6.61:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | muted (0.050) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 3.17:1 |
| White text | 6.61:1 |
Values
| HEX | #3F6174 |
| RGB | rgb(63, 97, 116) |
| HSL | hsl(202, 30%, 35%) |
| OKLCH | oklch(47.4% 0.05 233.8) |
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 #3F6174 | 6.61:1 | AA | Lc -87.7 | Fine for body text |
| Black text on #3F6174 | 3.17:1 | AA large text | Lc 21.4 | Dividers and decoration only |
| #3F6174 text on white | 6.61:1 | AA | Lc 82.7 | Fine for body text |
| #3F6174 text on black | 3.17:1 | AA large text | Lc -19.3 | 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
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E5EBEE
oklch(93.6% 0.008 228.9)
-
Step 200
200
#D1DBE1
oklch(88.6% 0.014 233.8)
-
Step 300
300
#B2C4CE
oklch(81% 0.024 231.9)
-
Step 400
400
#8AA5B5
oklch(70.7% 0.038 234.1)
-
Step 500
500
#6C8FA3
oklch(63.1% 0.049 233.6)
-
Step 600
600
#53798E
oklch(55.6% 0.054 233.2)
-
Step 700
700 (this color)
#3F6174
oklch(47.4% 0.05 233.8)
-
Step 800
800
#385362
oklch(42.7% 0.041 233.3)
-
Step 900
900
#304550
oklch(37.7% 0.032 231.5)
-
Step 950
950
#1D282F
oklch(27% 0.02 236.4)
#3F6174 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) | #586075 | 0.033 |
| Deuteranopia (no green cones) | #515A74 | 0.030 |
| Tritanopia (no blue cones) | #296667 | 0.038 |
| Achromatopsia (no color) | #5D5D5D | 0.050 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F6174
#3F6174
oklch(47.4% 0.05 233.8)
- #735541
#735541
oklch(47.6% 0.05 54.9)
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 #3F6174, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.024
- Slate #516572 ΔE 0.028
- Denim #3B638C ΔE 0.038
- Dusty Grape #545775 ΔE 0.040
- Light Navy Blue #2E5A88 ΔE 0.048
- Petrol #005F6A ΔE 0.048
- Dark Aqua #05696B ΔE 0.049
- Dusk #4E5481 ΔE 0.053
Use #3F6174 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.