#306F88
Closest named color: Sea Blue (#047495). oklch(51.1% 0.075 227.2), rgb(48, 111, 136).
Aa
White text reads best on this color (5.59:1).
About this color
#306F88 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 51%, its chroma 0.075 and its hue 227°. Its hue sits on the cool side of the wheel. The nearest named color is Sea Blue (#047495), ΔE 0.026 away. White text reads best on it, at 5.59:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.075) |
| Temperature | cool |
| Nearest name | Sea Blue (#047495) |
| Black text | 3.75:1 |
| White text | 5.59:1 |
Values
| HEX | #306F88 |
| RGB | rgb(48, 111, 136) |
| HSL | hsl(197, 48%, 36%) |
| OKLCH | oklch(51.1% 0.075 227.2) |
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 #306F88 | 5.59:1 | AA | Lc -83.0 | Fine for body text |
| Black text on #306F88 | 3.75:1 | AA large text | Lc 26.3 | Dividers and decoration only |
| #306F88 text on white | 5.59:1 | AA | Lc 77.7 | Fine for body text |
| #306F88 text on black | 3.75:1 | AA large text | Lc -24.0 | 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E3EBEF
oklch(93.5% 0.01 228.9)
-
Step 200
200
#CCDCE4
oklch(88.5% 0.02 229.1)
-
Step 300
300
#A9C6D3
oklch(80.9% 0.036 226.7)
-
Step 400
400
#7AA8BD
oklch(70.6% 0.058 227.9)
-
Step 500
500
#5593AD
oklch(63.2% 0.075 227)
-
Step 600
600
#387D98
oklch(55.7% 0.081 226.7)
-
Step 700
700 (this color)
#306F88
oklch(51.1% 0.075 227.2)
-
Step 800
800
#245669
oklch(42.8% 0.062 226)
-
Step 900
900
#234756
oklch(37.8% 0.049 227.3)
-
Step 950
950
#152A32
oklch(27.1% 0.031 224.6)
#306F88 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) | #626D89 | 0.056 |
| Deuteranopia (no green cones) | #556488 | 0.048 |
| Tritanopia (no blue cones) | #007677 | 0.045 |
| Achromatopsia (no color) | #686868 | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #306F88
#306F88
oklch(51.1% 0.075 227.2)
- #8A5940
#8A5940
oklch(51.2% 0.075 47.6)
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 #306F88, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea Blue #047495 ΔE 0.026
- Ocean Blue #03719C ΔE 0.034
- Metallic Blue #4F738E ΔE 0.036
- Ocean #017B92 ΔE 0.037
- Deep Aqua #08787F ΔE 0.039
- Denim #3B638C ΔE 0.039
- Muted Blue #3B719F ΔE 0.039
- Peacock Blue #016795 ΔE 0.044
Use #306F88 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.