#34728F
Closest named color: Sea Blue (#047495). oklch(52.4% 0.078 231.1), rgb(52, 114, 143).
Aa
White text reads best on this color (5.31:1).
About this color
#34728F is a medium-dark, moderately saturated blue. In OKLCH its lightness is 52%, its chroma 0.078 and its hue 231°. Its hue sits on the cool side of the wheel. The nearest named color is Sea Blue (#047495), ΔE 0.022 away. White text reads best on it, at 5.31:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | moderately saturated (0.078) |
| Temperature | cool |
| Nearest name | Sea Blue (#047495) |
| Black text | 3.94:1 |
| White text | 5.31:1 |
Values
| HEX | #34728F |
| RGB | rgb(52, 114, 143) |
| HSL | hsl(199, 47%, 38%) |
| OKLCH | oklch(52.4% 0.078 231.1) |
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 #34728F | 5.31:1 | AA | Lc -81.6 | Fine for body text |
| Black text on #34728F | 3.94:1 | AA large text | Lc 27.8 | Dividers and decoration only |
| #34728F text on white | 5.31:1 | AA | Lc 76.3 | Fine for body text |
| #34728F text on black | 3.94:1 | 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E3EBEF
oklch(93.5% 0.01 228.9)
-
Step 200
200
#CDDCE4
oklch(88.6% 0.02 230.7)
-
Step 300
300
#ABC5D4
oklch(80.9% 0.035 233.2)
-
Step 400
400
#7DA8BE
oklch(70.8% 0.056 230.8)
-
Step 500
500
#5A92AD
oklch(63.2% 0.072 230.3)
-
Step 600
600 (this color)
#34728F
oklch(52.4% 0.078 231.1)
-
Step 700
700
#2F6883
oklch(49.1% 0.073 231.5)
-
Step 800
800
#28556A
oklch(42.7% 0.06 230.7)
-
Step 900
900
#264656
oklch(37.7% 0.047 231.6)
-
Step 950
950
#172932
oklch(27% 0.029 231)
#34728F 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) | #637090 | 0.053 |
| Deuteranopia (no green cones) | #57678F | 0.047 |
| Tritanopia (no blue cones) | #007A7C | 0.051 |
| Achromatopsia (no color) | #6B6B6B | 0.078 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #34728F
#34728F
oklch(52.4% 0.078 231.1)
- #8E5C3F
#8E5C3F
oklch(52.3% 0.078 50.5)
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 #34728F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea Blue #047495 ΔE 0.022
- Metallic Blue #4F738E ΔE 0.028
- Muted Blue #3B719F ΔE 0.028
- Ocean Blue #03719C ΔE 0.030
- Ocean #017B92 ΔE 0.031
- Dull Blue #49759C ΔE 0.031
- Cerulean #457B9D ΔE 0.037
- Flat Blue #3C73A8 ΔE 0.041
Use #34728F 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.