#3F7281
Closest named color: Metallic Blue (#4F738E). oklch(52.2% 0.06 219), rgb(63, 114, 129).
Aa
White text reads best on this color (5.33:1).
About this color
#3F7281 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 52%, its chroma 0.060 and its hue 219°. Its hue sits on the cool side of the wheel. The nearest named color is Metallic Blue (#4F738E), ΔE 0.029 away. White text reads best on it, at 5.33:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (52%) |
| Chroma | muted (0.060) |
| Temperature | cool |
| Nearest name | Metallic Blue (#4F738E) |
| Black text | 3.93:1 |
| White text | 5.33:1 |
Values
| HEX | #3F7281 |
| RGB | rgb(63, 114, 129) |
| HSL | hsl(194, 34%, 38%) |
| OKLCH | oklch(52.2% 0.06 219) |
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 #3F7281 | 5.33:1 | AA | Lc -81.8 | Fine for body text |
| Black text on #3F7281 | 3.93:1 | AA large text | Lc 27.6 | Dividers and decoration only |
| #3F7281 text on white | 5.33:1 | AA | Lc 76.4 | Fine for body text |
| #3F7281 text on black | 3.93:1 | AA large text | Lc -25.3 | 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
#E4EBEE
oklch(93.6% 0.009 225.1)
-
Step 200
200
#CEDCE0
oklch(88.5% 0.016 216.7)
-
Step 300
300
#ADC5CD
oklch(80.8% 0.028 219.8)
-
Step 400
400
#81A8B4
oklch(70.7% 0.046 218.6)
-
Step 500
500
#6092A2
oklch(63% 0.059 220.1)
-
Step 600
600
#457C8D
oklch(55.5% 0.064 220)
-
Step 700
700 (this color)
#3F7281
oklch(52.2% 0.06 219)
-
Step 800
800
#2D5661
oklch(42.8% 0.049 217.2)
-
Step 900
900
#29474F
oklch(37.8% 0.038 216.7)
-
Step 950
950
#19292F
oklch(26.9% 0.024 223.4)
#3F7281 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) | #686F82 | 0.051 |
| Deuteranopia (no green cones) | #5E6881 | 0.045 |
| Tritanopia (no blue cones) | #1A7777 | 0.037 |
| Achromatopsia (no color) | #6B6B6B | 0.060 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F7281
#3F7281
oklch(52.2% 0.06 219)
- #885E50
#885E50
oklch(52.3% 0.06 39.2)
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 #3F7281, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Metallic Blue #4F738E ΔE 0.029
- Deep Aqua #08787F ΔE 0.035
- Ocean #017B92 ΔE 0.039
- Sea Blue #047495 ΔE 0.041
- Slate #516572 ΔE 0.041
- Deep Turquoise #017374 ΔE 0.043
- Bluegreen #017A79 ΔE 0.044
- Dull Blue #49759C ΔE 0.045
Use #3F7281 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.