#39748B
Closest named color: Metallic Blue (#4F738E). oklch(52.9% 0.071 226), rgb(57, 116, 139).
Aa
White text reads best on this color (5.19:1).
About this color
#39748B is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 53%, its chroma 0.071 and its hue 226°. 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 5.19:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.071) |
| Temperature | cool |
| Nearest name | Metallic Blue (#4F738E) |
| Black text | 4.04:1 |
| White text | 5.19:1 |
Values
| HEX | #39748B |
| RGB | rgb(57, 116, 139) |
| HSL | hsl(197, 42%, 38%) |
| OKLCH | oklch(52.9% 0.071 226) |
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 #39748B | 5.19:1 | AA | Lc -80.9 | Fine for body text |
| Black text on #39748B | 4.04:1 | AA large text | Lc 28.5 | Dividers and decoration only |
| #39748B text on white | 5.19:1 | AA | Lc 75.6 | Fine for body text |
| #39748B text on black | 4.04:1 | AA large text | Lc -26.2 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E4EBEF
oklch(93.6% 0.009 232.4)
-
Step 200
200
#CDDCE2
oklch(88.5% 0.018 223.6)
-
Step 300
300
#ACC5D1
oklch(80.9% 0.032 228.3)
-
Step 400
400
#7FA8B9
oklch(70.8% 0.051 225.3)
-
Step 500
500
#5D92A8
oklch(63.1% 0.065 226.2)
-
Step 600
600 (this color)
#39748B
oklch(52.9% 0.071 226)
-
Step 700
700
#33687D
oklch(49% 0.066 226.4)
-
Step 800
800
#2B5566
oklch(42.7% 0.055 226.6)
-
Step 900
900
#274653
oklch(37.6% 0.043 226.9)
-
Step 950
950
#182931
oklch(27% 0.027 229.2)
#39748B 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) | #68728C | 0.055 |
| Deuteranopia (no green cones) | #5C698B | 0.048 |
| Tritanopia (no blue cones) | #007B7B | 0.047 |
| Achromatopsia (no color) | #6D6D6D | 0.071 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #39748B
#39748B
oklch(52.9% 0.071 226)
- #8E5E48
#8E5E48
oklch(52.8% 0.071 45.4)
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 #39748B, 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 0.029
- Ocean #017B92 ΔE 0.029
- Dull Blue #49759C ΔE 0.033
- Cerulean #457B9D ΔE 0.035
- Muted Blue #3B719F ΔE 0.036
- Deep Aqua #08787F ΔE 0.037
- Ocean Blue #03719C ΔE 0.040
Use #39748B 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.