#306F90
Closest named color: Sea Blue (#047495). oklch(51.5% 0.083 234.5), rgb(48, 111, 144).
Aa
White text reads best on this color (5.52:1).
About this color
#306F90 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 52%, its chroma 0.083 and its hue 234°. 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 5.52:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | moderately saturated (0.083) |
| Temperature | cool |
| Nearest name | Sea Blue (#047495) |
| Black text | 3.80:1 |
| White text | 5.52:1 |
Values
| HEX | #306F90 |
| RGB | rgb(48, 111, 144) |
| HSL | hsl(201, 50%, 38%) |
| OKLCH | oklch(51.5% 0.083 234.5) |
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 #306F90 | 5.52:1 | AA | Lc -82.7 | Fine for body text |
| Black text on #306F90 | 3.80:1 | AA large text | Lc 26.7 | Dividers and decoration only |
| #306F90 text on white | 5.52:1 | AA | Lc 77.4 | Fine for body text |
| #306F90 text on black | 3.80:1 | AA large text | Lc -24.4 | 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
#E3EBF1
oklch(93.6% 0.012 239.9)
-
Step 200
200
#CCDCE6
oklch(88.5% 0.022 235)
-
Step 300
300
#A8C5D7
oklch(80.8% 0.04 235.3)
-
Step 400
400
#79A8C3
oklch(70.8% 0.064 234.1)
-
Step 500
500
#5492B4
oklch(63.2% 0.082 234.1)
-
Step 600
600
#377BA0
oklch(55.5% 0.089 235.4)
-
Step 700
700 (this color)
#306F90
oklch(51.5% 0.083 234.5)
-
Step 800
800
#23556F
oklch(42.8% 0.069 234.3)
-
Step 900
900
#22465A
oklch(37.7% 0.054 235)
-
Step 950
950
#152935
oklch(27% 0.034 236.3)
#306F90 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) | #5F6E92 | 0.052 |
| Deuteranopia (no green cones) | #52648F | 0.045 |
| Tritanopia (no blue cones) | #00787A | 0.056 |
| Achromatopsia (no color) | #696969 | 0.083 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #306F90
#306F90
oklch(51.5% 0.083 234.5)
- #8C5A37
#8C5A37
oklch(51.5% 0.083 54.8)
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 #306F90, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea Blue #047495 ΔE 0.022
- Ocean Blue #03719C ΔE 0.025
- Muted Blue #3B719F ΔE 0.027
- Metallic Blue #4F738E ΔE 0.035
- Denim #3B638C ΔE 0.035
- Dull Blue #49759C ΔE 0.036
- Ocean #017B92 ΔE 0.037
- Peacock Blue #016795 ΔE 0.038
Use #306F90 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.