#3F798D
Closest named color: Metallic Blue (#4F738E). oklch(54.5% 0.068 222.8), rgb(63, 121, 141).
Aa
White text reads best on this color (4.84:1).
About this color
#3F798D is a medium-dark, muted teal or cyan. In OKLCH its lightness is 54%, its chroma 0.068 and its hue 223°. Its hue sits on the cool side of the wheel. The nearest named color is Metallic Blue (#4F738E), ΔE 0.023 away. White text reads best on it, at 4.84:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (54%) |
| Chroma | muted (0.068) |
| Temperature | cool |
| Nearest name | Metallic Blue (#4F738E) |
| Black text | 4.33:1 |
| White text | 4.84:1 |
Values
| HEX | #3F798D |
| RGB | rgb(63, 121, 141) |
| HSL | hsl(195, 38%, 40%) |
| OKLCH | oklch(54.5% 0.068 222.8) |
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 #3F798D | 4.84:1 | AA | Lc -78.9 | Fine for body text |
| Black text on #3F798D | 4.33:1 | AA large text | Lc 30.6 | Non-text elements, placeholder text |
| #3F798D text on white | 4.84:1 | AA | Lc 73.5 | Content text, not long reading |
| #3F798D text on black | 4.33:1 | AA large text | Lc -28.2 | 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 600.
-
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
#CEDCE1
oklch(88.5% 0.017 221.1)
-
Step 300
300
#ACC5CF
oklch(80.8% 0.031 223.9)
-
Step 400
400
#7FA8B7
oklch(70.7% 0.049 222.4)
-
Step 500
500
#5E92A5
oklch(63.1% 0.062 223.1)
-
Step 600
600 (this color)
#3F798D
oklch(54.5% 0.068 222.8)
-
Step 700
700
#34697B
oklch(49.2% 0.063 222.6)
-
Step 800
800
#2C5564
oklch(42.6% 0.052 224)
-
Step 900
900
#284751
oklch(37.8% 0.04 220.6)
-
Step 950
950
#182930
oklch(26.9% 0.026 225.8)
#3F798D 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) | #6D768E | 0.055 |
| Deuteranopia (no green cones) | #626E8D | 0.049 |
| Tritanopia (no blue cones) | #007F7F | 0.046 |
| Achromatopsia (no color) | #717171 | 0.068 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F798D
#3F798D
oklch(54.5% 0.068 222.8)
- #926350
#926350
oklch(54.5% 0.068 42.8)
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 #3F798D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Metallic Blue #4F738E ΔE 0.023
- Cerulean #457B9D ΔE 0.026
- Ocean #017B92 ΔE 0.030
- Stormy Blue #507B9C ΔE 0.031
- Dull Blue #49759C ΔE 0.032
- Sea Blue #047495 ΔE 0.040
- Deep Aqua #08787F ΔE 0.041
- Muted Blue #3B719F ΔE 0.043
Use #3F798D 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.