#306F8F
Closest named color: Sea Blue (#047495). oklch(51.5% 0.082 233.6), rgb(48, 111, 143).
Aa
White text reads best on this color (5.53:1).
About this color
#306F8F is a medium-dark, moderately saturated blue. In OKLCH its lightness is 51%, its chroma 0.082 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 5.53:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.082) |
| Temperature | cool |
| Nearest name | Sea Blue (#047495) |
| Black text | 3.79:1 |
| White text | 5.53:1 |
Values
| HEX | #306F8F |
| RGB | rgb(48, 111, 143) |
| HSL | hsl(200, 50%, 37%) |
| OKLCH | oklch(51.5% 0.082 233.6) |
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 #306F8F | 5.53:1 | AA | Lc -82.7 | Fine for body text |
| Black text on #306F8F | 3.79:1 | AA large text | Lc 26.7 | Dividers and decoration only |
| #306F8F text on white | 5.53:1 | AA | Lc 77.4 | Fine for body text |
| #306F8F text on black | 3.79:1 | 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
#E3EBF0
oklch(93.5% 0.011 234.8)
-
Step 200
200
#CCDCE6
oklch(88.5% 0.022 235)
-
Step 300
300
#A8C6D7
oklch(81% 0.04 232.8)
-
Step 400
400
#79A8C2
oklch(70.7% 0.063 233)
-
Step 500
500
#5492B3
oklch(63.1% 0.081 233.3)
-
Step 600
600
#377C9F
oklch(55.7% 0.088 233.5)
-
Step 700
700 (this color)
#306F8F
oklch(51.5% 0.082 233.6)
-
Step 800
800
#23556E
oklch(42.7% 0.067 233.2)
-
Step 900
900
#224659
oklch(37.6% 0.053 233.6)
-
Step 950
950
#152934
oklch(26.9% 0.033 233.9)
#306F8F 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) | #5F6E91 | 0.052 |
| Deuteranopia (no green cones) | #52648F | 0.045 |
| Tritanopia (no blue cones) | #00787A | 0.054 |
| Achromatopsia (no color) | #686868 | 0.082 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #306F8F
#306F8F
oklch(51.5% 0.082 233.6)
- #8C5A38
#8C5A38
oklch(51.5% 0.082 54.1)
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 #306F8F, 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 0.026
- Muted Blue #3B719F ΔE 0.028
- Metallic Blue #4F738E ΔE 0.035
- Denim #3B638C ΔE 0.035
- Ocean #017B92 ΔE 0.037
- Dull Blue #49759C ΔE 0.037
- Peacock Blue #016795 ΔE 0.038
Use #306F8F 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.