#39728B
Closest named color: Metallic Blue (#4F738E). oklch(52.4% 0.071 228.9), rgb(57, 114, 139).
Aa
White text reads best on this color (5.31:1).
About this color
#39728B is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 52%, its chroma 0.071 and its hue 229°. Its hue sits on the cool side of the wheel. The nearest named color is Metallic Blue (#4F738E), ΔE 0.024 away. White text reads best on it, at 5.31:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (52%) |
| Chroma | moderately saturated (0.071) |
| Temperature | cool |
| Nearest name | Metallic Blue (#4F738E) |
| Black text | 3.95:1 |
| White text | 5.31:1 |
Values
| HEX | #39728B |
| RGB | rgb(57, 114, 139) |
| HSL | hsl(198, 42%, 38%) |
| OKLCH | oklch(52.4% 0.071 228.9) |
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 #39728B | 5.31:1 | AA | Lc -81.6 | Fine for body text |
| Black text on #39728B | 3.95:1 | AA large text | Lc 27.8 | Dividers and decoration only |
| #39728B text on white | 5.31:1 | AA | Lc 76.3 | Fine for body text |
| #39728B text on black | 3.95:1 | AA large text | Lc -25.5 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E4EBEF
oklch(93.6% 0.009 232.4)
-
Step 200
200
#CEDCE3
oklch(88.6% 0.018 229)
-
Step 300
300
#ACC5D1
oklch(80.9% 0.032 228.3)
-
Step 400
400
#7FA7BA
oklch(70.6% 0.052 228.7)
-
Step 500
500
#5E91A9
oklch(63% 0.065 229.3)
-
Step 600
600 (this color)
#39728B
oklch(52.4% 0.071 228.9)
-
Step 700
700
#34687F
oklch(49.1% 0.067 229.1)
-
Step 800
800
#2C5567
oklch(42.8% 0.055 228.5)
-
Step 900
900
#284654
oklch(37.7% 0.043 229.5)
-
Step 950
950
#182931
oklch(27% 0.027 229.2)
#39728B 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) | #65708C | 0.051 |
| Deuteranopia (no green cones) | #59678B | 0.046 |
| Tritanopia (no blue cones) | #00797A | 0.049 |
| Achromatopsia (no color) | #6B6B6B | 0.072 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #39728B
#39728B
oklch(52.4% 0.071 228.9)
- #8C5D45
#8C5D45
oklch(52.3% 0.072 47.7)
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 #39728B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Metallic Blue #4F738E ΔE 0.024
- Sea Blue #047495 ΔE 0.028
- Ocean #017B92 ΔE 0.033
- Dull Blue #49759C ΔE 0.033
- Muted Blue #3B719F ΔE 0.034
- Ocean Blue #03719C ΔE 0.037
- Cerulean #457B9D ΔE 0.038
- Deep Aqua #08787F ΔE 0.040
Use #39728B 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.